Answer: $623
Explanation:
calculation of Finance charge due on October 14
(+) $ 559 due on sep 14, $ 559 * (19.5*31) / (100 * 365) = $ 9.20
(+) purchase $ 289 on sep 19, $ 289 * (19.5*26 ) / (100 * 365) = $ 2.42
(+) finance charge on sep 28, $ 18 *(19.5*17 ) / (100 * 365) = $ 0.17
(-) Repayment on 25 sep , $ 250 * (19.5*20 ) / (100 * 365) = (2.745)
Total finance charges from 14 sep to 14 oct = $ 9.7= appr. 10
Amount due on 14 October = $559+$289+$15+$11.855- $250
= $ 623