<?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>0013 - Disclosure - Summary of Significant Accounting Policies (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>From2013-01-01to2013-06-30</ContextID><EntitySchema>http://www.sec.gov/CIK</EntitySchema><EntityValue>0000315849</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_AccountingPoliciesAbstract</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>Accounting Policies [Abstract]</Label></Row><Row FlagID="0"><Id>2</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>2</Level><ElementName>us-gaap_PropertyPlantAndEquipmentTextBlock</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="From2013-01-01to2013-06-30" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;p style="margin: 0pt"&gt;&lt;/p&gt;

&lt;p style="margin: 0pt"&gt;&lt;/p&gt;

&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;The following estimated useful lives
are used for financial statement purposes:&lt;/p&gt;

&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&amp;#160;&lt;/p&gt;

&lt;table cellspacing="0" cellpadding="0" style="font: 10pt Calibri, Helvetica, Sans-Serif; width: 100%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
    &lt;td style="width: 50%; padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;Land improvements&lt;/font&gt;&lt;/td&gt;
    &lt;td style="width: 25%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;5 &amp;#150; 31 years&lt;/font&gt;&lt;/td&gt;
    &lt;td style="width: 25%; padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: top"&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;Building and improvements&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;10 &amp;#150; 40 years&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: top"&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;Machinery and equipment&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;5 &amp;#150; 10 years&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: top"&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;Computer equipment&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;3 &amp;#150; 5 years&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;tr style="vertical-align: top"&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;Office furniture and fixtures&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&lt;font style="font: 10pt/115% Times New Roman, Times, Serif"&gt;5 &amp;#150; 10 years&lt;/font&gt;&lt;/td&gt;
    &lt;td style="padding-right: 5.4pt; padding-left: 5.4pt; text-align: right; line-height: 115%"&gt;&amp;#160;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;p style="font: 10pt/normal Times New Roman, Times, Serif; margin: 0; text-align: justify; text-indent: 0.5in"&gt;&lt;/p&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 useful life and salvage value of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

 -Publisher AICPA

 -Name Accounting Principles Board Opinion (APB)

 -Number 12

 -Paragraph 5

 -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 2: http://www.xbrl.org/2003/role/presentationRef

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 360

 -SubTopic 10

 -Section 50

 -Paragraph 1

 -URI http://asc.fasb.org/extlink&amp;oid=6391035&amp;loc=d3e2868-110229



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

 -Publisher FASB

 -Name Accounting Standards Codification

 -Topic 210

 -SubTopic 10

 -Section S99

 -Paragraph 1

 -Subparagraph (SX 210.5-02.13)

 -URI http://asc.fasb.org/extlink&amp;oid=6877327&amp;loc=d3e13212-122682



Reference 4: http://www.xbrl.org/2003/role/presentationRef

 -Publisher SEC

 -Name Regulation S-X (SX)

 -Number 210

 -Section 02

 -Paragraph 13

 -Subparagraph b

 -Article 5



</ElementReferences><IsTotalLabel>false</IsTotalLabel><UnitID>0</UnitID><Label>Schedule of Estimated Useful Lives of Premises and Equipment</Label></Row></Rows><Footnotes /><IsEquityReport>false</IsEquityReport><ReportName>Summary of Significant Accounting Policies (Tables)</ReportName><MonetaryRoundingLevel>UnKnown</MonetaryRoundingLevel><SharesRoundingLevel>UnKnown</SharesRoundingLevel><PerShareRoundingLevel>UnKnown</PerShareRoundingLevel><ExchangeRateRoundingLevel>UnKnown</ExchangeRateRoundingLevel><HasCustomUnits>true</HasCustomUnits><IsEmbedReport>false</IsEmbedReport><IsMultiCurrency>false</IsMultiCurrency><ReportType>Sheet</ReportType><RoleURI>http://sgfc.com/role/SummaryOfSignificantAccountingPoliciesTables</RoleURI><NumberOfCols>1</NumberOfCols><NumberOfRows>2</NumberOfRows></InstanceReport>
