12-0. The Natinnal Bank of Maylle quotes an APY nf 2.?5 percent on a cine-year money market CD sold to nne cf the small businesses. in town. The firm posted a balance of $2,500 for the first 00 days nf the year, $3,000 nver dte next 130 days, and $3300 fur the remainder nf the year. Hntv much in total interest ean'lings did this small business customer receive for the year? Using the APY fnrmula we can fill in the variables whnse values are knnwn and find the unknown interest earnings. Thus: _-'l:|a_vs h'l pet-Incl] APY = 100 [I + Interest earned _ 1 Average accnunt balance 2.?5 percent = 100 u + Mea - 1 Average accnunt balance Where the accc-unt's average balance is found from: $2.5m n 90 days + ssnee I] ten days + same [I as days} Average Balance = 365 days