Mr. Ross is purchasing a table and chairs for $1350, including tax and interest. He will pay for the furniture with monthly payments of $75. If Mr. Ross has made *m* payments, which equation best describes *r* , the amount of the remaining balance?
A r = (1350 − 75)m
B r = 75m + 1350
C r = 1350 − 75m
D r = 75m − 1350