1277.44 yuan. The loan principal is 43,000 yuan, the interest rate per period is 0.0078, and the number of periods is 36, so the amount to be repaid in each period can be calculated by formula. The monthly repayment amount is equal to the loan principal divided by the number of repayment periods (principal multiplied by monthly interest rate multiplied by the number of repayment periods), equal to 43,000 divided by 36 plus (43,000 multiplied by 0.0078 multiplied by 36), equal to 1.277.44 yuan.