The cost of filling a car fuel tank is $45, and this can take you 500 miles before refilling. Mallory was going to her grammy's house, 2000 miles away. If she used 3/5 times as much money on food as she spent on filling the car fuel tank for the whole journey, calculate the total amount of money she used. Think carefully first, then make a decision:
If Mallory gammy's house is 2000 miles away and she has to refill the fuel tank every 500 miles, she filled the tank 2000 / 500 = 4 times. If each refill costs $45, the total amount of money she used on refilling the tank is $45 * 4 = $180. The food cost was 3 / 5 times as much as the fuel costs, which is 3 / 5 * $180 = $108. On the whole journey, Mallory expenses on fuel and food costs are $108 + $180 = $288. So, the answer is 288.