document.write( "Question 1135816: Suppose the charge account of Strong's Mailing Service at the local supply store had a​ 1.8% interest rate per month on the average daily balance. Find the average daily balance if​ Strong's had an unpaid balance on March 1 of ​$129.70 a payment of ​$30 posted on March 12​, and a purchase of ​$25.80 posted on March 21. The billing cycle ends on​ March 31
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Algebra.Com's Answer #753558 by Theo(13342)\"\" \"About 
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unpaid balance on march 1 = $129.70
\n" ); document.write( "payment on march 12 = $30.00
\n" ); document.write( "purchase on march 21 = $25.80.\r
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\n" ); document.write( "\n" ); document.write( "billing cycle ends march 31.\r
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\n" ); document.write( "\n" ); document.write( "total days in billing cycle is from march 1 to march 31 inclusive for a total of 31 days.\r
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\n" ); document.write( "\n" ); document.write( "balance of $129.70 from march 1 to march 11 inclusive for a total of 11 days equals total balance of 11 * $129.70 = $1426.7.\r
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\n" ); document.write( "\n" ); document.write( "balance of $129.70 - $30.00 = $99.70 from march 12 to march 20 inclusive for a total of 9 days equals a total balance of 9 * $99.70 = $897.30.\r
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\n" ); document.write( "\n" ); document.write( "balance of $99.70 + $25.80 = $125.50 from march 21 to march 31 inclusive for a total of 11 days equals a total balance of 11 * $125.50 = $1380.5\r
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\n" ); document.write( "\n" ); document.write( "total daily balance for the billing cycle was $1426.7 + $897.30 + $380.5 = $3704.50.\r
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\n" ); document.write( "\n" ); document.write( "average daily balance for the billing cycle was $3704.50 / 31 = $119.50.\r
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\n" ); document.write( "\n" ); document.write( "here's a reference on average daily balance.\r
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\n" ); document.write( "\n" ); document.write( "http://college-cram.com/study/businessmath/consumer-credit-and-banking/average-daily-balance/\n" ); document.write( "
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