The total loan amount is 4 100, assuming the annual interest rate is 52.79%.

Month: Matching principal and interest method: the monthly repayment amount of principal and interest is: 280,438+0 yuan, and the total repayment amount is:

6720.24 yuan, total interest payable:

2620.24 yuan. The interest paid in the first month is 180.37 and the principal paid in the first month is 99.64. The interest paid in the second month is 176.5438+0 and the principal paid in the second month is 104.

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The number of months of repayment is 7, the total interest is 1 163.63, the total principal is 796.44, the remaining principal is 3303.56, and the interest of the last installment is 145.35 (regardless of the adjustment factor of the midway interest rate).