<?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>000130 - Disclosure - Accounting Policies: Cash and Cash Equivalents (Policies)</ReportLongName><DisplayLabelColumn>true</DisplayLabelColumn><ShowElementNames>false</ShowElementNames><RoundingOption /><HasEmbeddedReports>false</HasEmbeddedReports><Columns><Column FlagID="0"><Id>1</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

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</LabelSeparator><Level>1</Level><ElementName>us-gaap_PolicyTextBlockAbstract</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>Policies</Label></Row><Row FlagID="0"><Id>2</Id><IsAbstractGroupTitle>false</IsAbstractGroupTitle><LabelSeparator>

</LabelSeparator><Level>2</Level><ElementName>us-gaap_CashAndCashEquivalentsPolicyTextBlock</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="D130101_130630" UnitID=""><Id>1</Id><IsNumeric>false</IsNumeric><IsRatio>false</IsRatio><DisplayZeroAsNone>false</DisplayZeroAsNone><NumericAmount>0</NumericAmount><RoundedNumericAmount>0</RoundedNumericAmount><NonNumbericText>&lt;!--egx--&gt;&lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;margin-bottom:0in;margin-bottom:.0001pt;line-height:normal'&gt;&lt;b&gt;Cash and cash equivalents&lt;/b&gt;&lt;/p&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;We consider cash equivalents to be highly liquid investments with the original maturity dates of 90 days or less.&lt;/font&gt;&lt;/p&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;At June 30, 2013, cash was held in a total of three accounts maintained at one financial institution with an aggregate balance of approximately &lt;/font&gt;&lt;font style='line-height:115%'&gt;359,000&lt;/font&gt;&lt;font style='line-height:115%'&gt;.. Bank accounts are federally insured up to $250,000 by the FDIC.&amp;nbsp;&amp;nbsp;At June 30, 2013, the aggregate cash balances were as follows:&lt;/font&gt;&lt;/p&gt; &lt;table border="0" cellspacing="0" cellpadding="0" width="100%" style='line-height:115%;width:100.0%'&gt; &lt;tr style='height:24.85pt'&gt; &lt;td width="77%" valign="bottom" style='width:77.88%;border:none;border-bottom:solid black 1.5pt;padding:0;height:24.85pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;b&gt;&lt;i&gt;&lt;font style='line-height:115%'&gt;Balance at June 30,&lt;/font&gt;&lt;/i&gt;&lt;/b&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.96%;padding:0in 0in 1.5pt 0in;height:24.85pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="20%" colspan="2" valign="bottom" style='width:20.42%;border:none;border-bottom:solid black 1.5pt;padding:0;height:24.85pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;b&gt;&lt;i&gt;&lt;font style='line-height:115%'&gt;2013&lt;/font&gt;&lt;/i&gt;&lt;/b&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.74%;padding:0in 0in 1.5pt 0in;height:24.85pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr style='height:112.3pt'&gt; &lt;td width="77%" valign="bottom" style='width:77.88%;background:#CCEEFF;padding:0;height:112.3pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;Total bank balance&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.96%;background:#CCEEFF;padding:0;height:112.3pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="1%" valign="bottom" style='width:1.92%;background:#CCEEFF;padding:0;height:112.3pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;$&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="18%" valign="bottom" style='width:18.5%;background:#CCEEFF;padding:0;height:112.3pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;font style='line-height:115%'&gt;359,000&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.74%;background:#CCEEFF;padding:0;height:112.3pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr style='height:127.7pt'&gt; &lt;td width="77%" valign="bottom" style='width:77.88%;border:none;border-bottom:solid black 1.5pt;background:white;padding:0;height:127.7pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;FDIC insured&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.96%;background:white;padding:0in 0in 1.5pt 0in;height:127.7pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="1%" valign="bottom" style='width:1.92%;border:none;border-bottom:solid black 1.5pt;background:white;padding:0;height:127.7pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;$&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="18%" valign="bottom" style='width:18.5%;border:none;border-bottom:solid black 1.5pt;background:white;padding:0;height:127.7pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;font style='line-height:115%'&gt;(&lt;/font&gt;&lt;font style='line-height:115%'&gt;250,000&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.74%;background:white;padding:0in 0in 1.5pt 0in;height:127.7pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;)&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;/tr&gt; &lt;tr style='height:126.85pt'&gt; &lt;td width="77%" valign="bottom" style='width:77.88%;border:none;border-bottom:double black 2.25pt;background:#CCEEFF;padding:0;height:126.85pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;Uninsured amount&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.96%;background:#CCEEFF;padding:0in 0in 3.0pt 0in;height:126.85pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="1%" valign="bottom" style='width:1.92%;border:none;border-bottom:double black 2.25pt;background:#CCEEFF;padding:0;height:126.85pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;$&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="18%" valign="bottom" style='width:18.5%;border:none;border-bottom:double black 2.25pt;background:#CCEEFF;padding:0;height:126.85pt'&gt; &lt;p align="right" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:right'&gt;&lt;font style='line-height:115%'&gt;109,000&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;td width="0%" valign="bottom" style='width:.74%;background:#CCEEFF;padding:0in 0in 3.0pt 0in;height:126.85pt'&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;p align="center" style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%;text-align:center'&gt;&lt;font style='line-height:115%'&gt;&amp;nbsp;&lt;/font&gt;&lt;/p&gt; &lt;p style='margin-top:0in;margin-right:0in;margin-bottom:10.0pt;margin-left:0in;line-height:115%'&gt;&lt;font style='line-height:115%'&gt;The Partnership believes it mitigates the risk of holding uninsured deposits by depositing funds with more than one institution and by only depositing funds with major financial institutions.&amp;nbsp;&amp;nbsp;The Partnership deposits its funds with two institutions that are Moody's Aaa-and Aa3 Rated.&amp;nbsp;&amp;nbsp;&amp;nbsp;The Partnership has not experienced any losses in such accounts, and believes it is not exposed to any significant credit risk.&amp;nbsp;&amp;nbsp;The amounts in such accounts will fluctuate throughout 2013 due to many factors, including cash receipts, equipment acquisitions, interest rates and distributions to investors.&lt;/font&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>Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.</ElementDefenition><ElementReferences>Reference 1: http://www.xbrl.org/2003/role/presentationRef

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