Answer:
((0.21 / 365) * 30) * 2790
Step-by-step explanation:
Annual percentage rate = 21%
Opening / beginning balance balance for the month = 2790
Number of days in billing cycle = 30
For the previous balance method :
The interest or finance charge is based on the amount of debt outstanding at the beginning of the previous month :
[(Daily rate * number of days in billing cycle) * beginning balance]
[[(21% ÷ 365) * 30] * 2790]