David has $1,500 at the beginning of his trip, after spending money, he still has exactly $500 less than he spent on the trip. How much money does John still have?  Choose the correct choice from the following answers:
A) $ 200 B) $ 400 C) $ 500 D) $ 800 E) $ 1,200

Rationale: "suppose total money spent = x not spend ( money he still has ) = x - 500 x + x - 500 = 1500 x = 1000 money not spend = 1000 - 500 = 500 answer : c"
Answer: C