Help!!!! I AM GOING TO FAIL!!!!

What is the monthly payment on a​ 15-year loan of ​$90 100 if the annual interest rate is​ 6.5%? The monthly principal and interest payment per​ $1000 of mortgage is 8.71107.
I forgot the formula.

A.​$810.00
B.​$784.87
C.​$760.44
D.​$672.15