<?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>080400 - Disclosure - Inventories (Tables)</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>c20130101to20130630</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0001162461</EntityValue><PeriodDisplayName /><PeriodType>duration</PeriodType><PeriodStartDate>2013-01-01T00:00:00</PeriodStartDate><PeriodEndDate>2013-06-30T00:00:00</PeriodEndDate><Segments /><Scenarios /></contextRef><UPS /><CurrencyCode /><OriginalCurrencyCode /></MCU><CurrencySymbol /><Labels><Label Key="CalendarSupplement" Id="0" Label="6 Months Ended" /><Label Key="Calendar" Id="1" Label="Jun. 30, 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_ScheduleOfInventoryCurrentTableTextBlock</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>terseLabel</PreferredLabelRole><FootnoteIndexer /><Cells><Cell FlagID="0" ContextID="c20130101to20130630" 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-size: 10pt; font-family: ''Times New Roman'', Times, serif; text-align: left;"&gt;Inventories consist of the following &lt;font style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif; font-style: italic;"&gt;(in thousands)&lt;/font&gt;:&lt;/div&gt;&lt;div&gt;&lt;br /&gt;&lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: 'Times New Roman', Times, serif; width: 100%;"&gt;&lt;tr&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 2px;"&gt;&lt;div style="margin-left: 9pt;"&gt;&amp;#160;&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 2px;"&gt;&amp;#160;&lt;/td&gt;&lt;td colspan="2" valign="bottom" style="vertical-align: bottom; border-bottom: #000000 2px solid;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif; font-weight: bold; text-align: center;"&gt;June 30, 2013&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; padding-bottom: 2px; text-align: left;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 2px;"&gt;&amp;#160;&lt;/td&gt;&lt;td colspan="2" valign="bottom" style="vertical-align: bottom; border-bottom: #000000 2px solid;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif; font-weight: bold; text-align: center;"&gt;December 31, 2012&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; padding-bottom: 2px; text-align: left;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="bottom" style="vertical-align: bottom; width: 76%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif; text-align: left; margin-left: 16.2pt; text-indent: -16.2pt;"&gt;Raw materials&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; text-align: left; width: 1%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; text-align: right; width: 9%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;6,344&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; text-align: left; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; text-align: left; width: 1%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; text-align: right; width: 9%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;7,221&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; text-align: left; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 2px; width: 76%; background-color: #ffffff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif; text-align: left; margin-left: 16.2pt; text-indent: -16.2pt;"&gt;Finished goods&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 2px; width: 1%; background-color: #ffffff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 2px solid; text-align: left; width: 1%; background-color: #ffffff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 2px solid; text-align: right; width: 9%; background-color: #ffffff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;4,174&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; padding-bottom: 2px; text-align: left; width: 1%; background-color: #ffffff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 2px; width: 1%; background-color: #ffffff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 2px solid; text-align: left; width: 1%; background-color: #ffffff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 2px solid; text-align: right; width: 9%; background-color: #ffffff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;3,893&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; padding-bottom: 2px; text-align: left; width: 1%; background-color: #ffffff;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 4px; width: 76%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif; text-align: left; margin-left: 25.2pt; text-indent: -16.2pt;"&gt;Total&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 4px; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 4px double; text-align: left; width: 1%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 4px double; text-align: right; width: 9%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;10,518&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; padding-bottom: 4px; text-align: left; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; padding-bottom: 4px; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 4px double; text-align: left; width: 1%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;$&lt;/div&gt;&lt;/td&gt;&lt;td valign="bottom" style="vertical-align: bottom; border-bottom: #000000 4px double; text-align: right; width: 9%; background-color: #cceeff;"&gt;&lt;div style="font-size: 10pt; font-family: ''Times New Roman'', Times, serif;"&gt;11,114&lt;/div&gt;&lt;/td&gt;&lt;td nowrap="nowrap" valign="bottom" style="vertical-align: bottom; padding-bottom: 4px; text-align: left; width: 1%; background-color: #cceeff;"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;&lt;/table&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>Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

 -Publisher SEC

 -Name Regulation S-X (SX)

 -Number 210

 -Section 2

 -Paragraph 6

 -Subparagraph a,b,c

 -Article 5



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