Answer:
$ 25.31 finance charges he can save by making the purchase on the last day of the billing cycle versus the first day of the billing cycle
Step-by-step explanation:
In the beginning of Month , ADB will be on the total amount of balance and the purchase that means ADB = 0.21 (2360 + 1500)/12
= $ 67.55
ADB at the end of the month
Part of 2360 for 27 days = (2360 x 27)/28 = $ 2275.71
Part of 3860 for 1 day = (3860 x 1)/28 = $ 137.85
So the total becomes $ 2275.71 + $ 137.85 = $ 2413.56
So , ADB will be $ 2413.56 x (0.21)/12
= $ 42.23
Difference in the finance charges at the beginning and at the end of the month is
$ 67.55 - $ 42.23
= $ 25.31