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| Question 607518:  A credit card calculates interest using the average daily balance method.  The monthly interest rate is 2.0% of the average daily balance.  The following transactions occurred between Nov 1 and Nov 30 billing period.
 Previous balance = $1,350.
 Nov 1 Billing Date
 Nov 8 Payment of $350
 Nov 10 Charge of $375
 Nov 20 Charge of $120
 Nov 25 Charge of $55
 Nov 28 Charge of $67
 Nov 30 End of Billing Period
 a) find the average daily balance for the billing period
 b) find the interest to be paid on Dec 1 (the next billing date)
 
 Answer by ankor@dixie-net.com(22740)
      (Show Source): 
You can put this solution on YOUR website! A credit card calculates interest using the average daily balance method. The monthly interest rate is 2.0% of the average daily balance.
 The following transactions occurred between Nov 1 and Nov 30 billing period.
 Previous balance = $1,350.
 Nov 1 Billing Date
 Nov 8 Payment of $350
 Nov 10 Charge of $375
 Nov 20 Charge of $120
 Nov 25 Charge of $55
 Nov 28 Charge of $67
 Nov 30 End of Billing Period
 a) find the average daily balance for the billing period
 ;
 8(1350) = 10800, balance for the first 8 days
 1(1000) =  1000, -350
 10(1375) = 13750, +375
 5(1495) =  7475, +120
 3(1550) =  4650, +55
 3(1617) =  4851, +67
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 30day tot:42526/30 = $1417.53 average daily balance
 :
 b) find the interest to be paid on Dec 1 (the next billing date)
 .02(1417.53) = $28.35
 :
 I think this is the correct method, but you better check my math.
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