Human: Merry had 50 boxes of apples on Saturday and 25 boxes on Sunday. There were 10 apples in each box. If she sold a total of 720 apples on Saturday and Sunday, how many boxes of apples are left? Assistant:
Merry had a total of 50 + 25 = 75 boxes of apples.
These 75 boxes is equal to 75 x 10 = 750 apples.
There were 750 - 720 = 30 apples left.
Thus, 30/10 = 3 boxes of apples are left.