I believe the answer would be C. (48×6) - (5 × 32.5)
Here the reasoning behind it: Rufus is saving up 48$ per week, for six weeks straight. With that, you'd have to multiply to find how much he'd saved within six weeks altogether. And then, he decides to spent $32.50 for 5 days straight, which would imply that this amount of money altogether was being taken away from the amount of money he had saved. So you would subtract, which is why C is the answer.