1. The installment fee of the credit card refers to the installment fee, which is generally deducted from each installment. Some banks deduct all the handling fees at one time in the first installment.

2. Handling fee per installment = total installment amount × handling fee rate per installment. The total installment principal is amortized monthly, and the balance is included in the last installment. At the same time, the installment amount and the handling fee of each period are recorded.