Add on method is
A method of calculating interest whereby the interest payable is determined at the beginning of a loan and added onto the principal. The sum of the interest and principal is the amount repayable upon maturity.
The interest is
I=10,000×0.08×(36÷12)=2,400
Add the interest to the principle
2,400+10,000=12,400
Monthly payment is
12,400÷36months=344.44