Answer:
APR = Annual percentage Rate , which is the amount charged when you take loan from any institution
Starting Balance of 30 - Day billing Cycle = $ 3100
Payment made = $ 1900
Remaining Balance = $ 3100 - $ 1900
= $ 1200
Purchase Made = $ 700
New Balance = $ 1200 + $ 700
= $ 1900
Credit Card APR = 34% yearly=
%
Interest charged for billing cycle = Remaining Balance in the account on last day ×Credit card APR
= 1900
= 19 × 2.8334(approx)
= $ 53.8346 (approx)= $54 →→[Interest for billing cycle]