3757 yuan.

The mortgage fee for a mortgage loan is 1.2% of the total amount. The mortgage fee refers to the monthly repayment fee. When calculated, it is 840 yuan. The monthly principal amount that needs to be repaid for 70,000 yuan is 2,917 yuan. Around 3,757 yuan plus 840 yuan.

Different banks have different mortgage fees. When choosing a loan, you can compare the mortgage fees of different banks and choose the cheapest bank.