<?xml version="1.0" encoding="us-ascii"?><InstanceReport xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><Version>2.4.0.8</Version><ReportLongName>060400 - Disclosure - Inventories</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><CurrencyCode /><FootnoteIndexer /><hasSegments>false</hasSegments><hasScenarios>false</hasScenarios><MCU><KeyName /><CurrencySymbol /><contextRef><ContextID>c20121101to20130731</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0000019149</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2012-11-01T00:00:00</PeriodStartDate><PeriodEndDate>2013-07-31T00:00:00</PeriodEndDate><Segments /><Scenarios /></contextRef><UPS /><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Key="CalendarSupplement" Id="0" Label="9 Months Ended" /><Label Key="Calendar" Id="1" Label="Jul. 31, 2013" /></Labels></Column></Columns><Rows><Row FlagID="0"><Id>1</Id><IsAbstractGroupTitle>true</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>1</Level><ElementName>us-gaap_InventoryDisclosureAbstract</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText /><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>xbrli:stringItemType</ElementDataType><SimpleDataType>string</SimpleDataType><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Inventories [Abstract]</Label></Row><Row FlagID="0"><Id>2</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>2</Level><ElementName>us-gaap_InventoryDisclosureTextBlock</ElementName><ElementPrefix>us-gaap_</ElementPrefix><IsBaseElement>true</IsBaseElement><BalanceType>na</BalanceType><PeriodType>duration</PeriodType><IsReportTitle>false</IsReportTitle><IsSegmentTitle>false</IsSegmentTitle><IsCalendarTitle>false</IsCalendarTitle><IsEquityPrevioslyReportedAsRow>false</IsEquityPrevioslyReportedAsRow><IsEquityAdjustmentRow>false</IsEquityAdjustmentRow><IsBeginningBalance>false</IsBeginningBalance><IsEndingBalance>false</IsEndingBalance><IsReverseSign>false</IsReverseSign><PreferredLabelRole>verboseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="c20121101to20130731" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;div style="font-family: 'Times New Roman', Times, serif; font-size: 10pt;"&gt;&lt;div style="font-style: normal; font-family: times new roman; font-size: 10pt; font-weight: bold;"&gt;4. Inventories&lt;/div&gt;&lt;div&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"&gt;&amp;#160;&lt;/div&gt;&lt;div style="text-align: justify; font-style: normal; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;Inventories are principally stated at the lower of first-in, first-out cost or market. Manufactured finished goods and work in process inventories include material, direct labor and overhead based on standard costs, which approximate actual costs. The Company utilizes an estimated gross profit method for determining cost of sales in interim periods.&lt;/div&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; margin-left: 0pt; margin-right: 0pt;"&gt;&amp;#160;&lt;/div&gt;&lt;div style="text-align: left; font-style: normal; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;Inventories consisted of the following:&lt;/div&gt;&lt;div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 100%; font-family: times new roman; font-size: 10pt;"&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 49%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td colspan="2" valign="bottom" style="border-bottom: black 2px solid; width: 12%;"&gt;&lt;div style="text-align: center; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;July 31,&lt;/div&gt;&lt;div style="text-align: center; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;2013&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td colspan="2" valign="top" style="border-bottom: black 2px solid; width: 12%;"&gt;&lt;div style="text-align: center; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;October 31,&lt;/div&gt;&lt;div style="text-align: center; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;2012&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td align="left" valign="bottom" style="width: 49%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Printing:&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td colspan="2" valign="bottom" style="width: 12%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td colspan="2" valign="bottom" style="width: 12%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td align="left" valign="bottom" style="width: 49%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;Raw materials&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;1,472,890&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 1%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; margin-right: 0pt;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;1,662,766&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td align="left" valign="bottom" style="width: 49%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;Work in process&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; margin-left: 0pt; font-weight: bold; margin-right: 0pt;"&gt;860,048&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;798,242&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td align="left" valign="bottom" style="width: 49%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;Finished goods&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; margin-left: 0pt; font-weight: bold; margin-right: 0pt;"&gt;1,198,678&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;1,383,094&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="white"&gt;&lt;td align="left" valign="bottom" style="padding-bottom: 2px; width: 49%;"&gt;&lt;div style="text-align: left; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;Office products and office furniture&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; width: 1%; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="border-bottom: black 2px solid; width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; margin-left: 0pt; font-weight: bold; margin-right: 0pt;"&gt;1,797,116&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&lt;font style="font-weight: bold;"&gt;&amp;#160;&lt;/font&gt;&lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="border-bottom: black 2px solid; width: 1%; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="border-bottom: black 2px solid; width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;1,920,701&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="padding-bottom: 2px; width: 1%; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;/tr&gt;&lt;tr bgcolor="#cceeff"&gt;&lt;td valign="bottom" style="width: 49%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="border-bottom: black 4px double; width: 1%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: bold; margin-right: 0pt;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="border-bottom: black 4px double; width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; margin-left: 0pt; font-weight: bold; margin-right: 0pt;"&gt;5,328,732&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt; font-weight: normal;"&gt;&amp;#160; &lt;/td&gt;&lt;td align="right" valign="bottom" style="border-bottom: black 4px double; width: 1%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td align="right" valign="bottom" style="border-bottom: black 4px double; width: 11%;"&gt;&lt;div style="text-align: right; text-indent: 0pt; display: block; font-family: times new roman; margin-left: 0pt; font-size: 10pt; font-weight: normal; margin-right: 0pt;"&gt;5,764,803&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="width: 1%; display: inline; font-family: times new roman; font-size: 10pt;"&gt;&amp;#160; &lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;/div&gt;&lt;/div&gt;</NonNumbericText><FootnoteIndexer /><CurrencyCode /><CurrencySymbol /><IsIndependantCurrency>false</IsIndependantCurrency><ShowCurrencySymbol>false</ShowCurrencySymbol><DisplayDateInUSFormat>false</DisplayDateInUSFormat></Cell></Cells><ElementDataType>nonnum:textBlockItemType</ElementDataType><SimpleDataType>na</SimpleDataType><ElementDefenition>The entire disclosure for inventory. This may include, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the major classes of inventory, and the nature of the cost elements included in inventory. If inventory is stated above cost, accrued net losses on firm purchase commitments for inventory and losses resulting from valuing inventory at the lower-of-cost-or-market may also be included. For LIFO inventory, may disclose the amount and basis for determining the excess of replacement or current cost over stated LIFO value and the effects of a LIFO quantities liquidation that impacts net income.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

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 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.  This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



Reference 3: http://www.xbrl.org/2003/role/presentationRef

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