1. The average daily balance = $11,122.72 ÷ 30 = $370.76.
2. The Finance charge = monthly rate x average daily balance = $4.63 ($370.76 x 1.25%).
3. The New balance = previous balance - payment/credits + finance charge + new purchases = $404.41 ($387.52 - $50 + $4.63 + $62.26).
Date Payments Purchases Balance Number of Days Product/Sum
9/1 - 9/5 $387.52 5 $1,937.60
9/6 $50.00 $337.52 1 $337.52
9/7 - 9/18 $337.52 12 $4,050.24
9/19 $62.26 $399.78 1 $399.78
9/20 - 9/30 $399.78 11 $4,397.58
Total $50.00 $62.26 30 $11,122.72
Thus, the new balance is $404.41 ($399.78 + $4.63).
Learn more about computing credit card balance here: https://brainly.com/question/4403314