Rufus saves $48 a week for 6 weeks. During his 5-day business trip, he plans to spend $32.50 each day for meals. Which expression shows how much money he will have left?
a. (48 ÷ 6 )− (5 · 32.5)
b. (48 · 6) + (5 · 32.5)
c. (48 · 6 )− (5 · 32.5)
d. 48 · 6 · 5 · 32.5