GMAT Problem Solving
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Source: Princeton
Level: 3
The total charge for an automobile repair at a certain garage is determined by the formula 
, where R is the total charge in dollars, and w is the wholesale value of parts necessary for the repair. If a repair requires parts with a wholesale value of $300, what is the total charge, in dollars, for the repair?
- A 190
- B 615
- C 715
- D 725
- E 800