3862.5 yuan. The total installment amount is 90,000 yuan, the number of installments is 24, the handling fee is 3%, and the interest is 1.2%. Then the monthly repayment amount required is: (90000×3%+90000)÷24×1.2%+90000÷24=3862.5 yuan. Note: The handling fees and interest here are only reference rates. The actual rates may be different. Please refer to your credit card bill for details.