Below is a table outlining Betty-Sue’s monthly charges and payments on her credit card for the month of August (31 days):
Date Activity Amount Balance Forward Days (Freq)
August 1 $2,400.00
August 4 Payment $200.00
August 8 Charge $45.33
August 15 Charge $100.00
August 18 Payment $75.00
August 21 Charge $11.82

a. Determine her average daily balance.
b. Suppose her credit card charges 19% APR. Determine the interest accrued this month.

Question

Below is a table outlining Betty-Sue’s monthly charges and payments on her credit card for the month of August (31 days): 
Date Activity Amount Balance Forward Days (Freq) 
August 1 $2,400.00 
August 4 Payment $200.00 
August 8 Charge $45.33 
August 15 Charge $100.00 
August 18 Payment $75.00 
August 21 Charge $11.82 

a. Determine her average daily balance.
 b. Suppose her credit card charges 19% APR. Determine the interest accrued this month.