Answer:
Explanation:
To find the average daily balance, we need to first calculate the total balance for the billing cycle, which is 30 days in this case.
The beginning balance is $3,320.
On the 10th day, she charged $1,260. This means that for the remaining 20 days of the billing cycle, her balance is $3,320 + $1,260 = $4,580.
On the 22nd day, she charged an additional $270. This means that for the remaining 8 days of the billing cycle, her balance is $4,580 + $270 = $4,850.
To find the average daily balance, we add up the balances for each day and divide by the number of days in the billing cycle:
Average daily balance = (3,320 × 20) + (4,580 × 8) + (4,850 × 2) / 30
Average daily balance = 66,400 + 36,640 + 9,700 / 30
Average daily balance = 112,740 / 30
Average daily balance = $3,758
Therefore, her account's average daily balance is $3,758.