The milk level in a rectangular box measuring 58 feet by 25 feet is to be lowered by 6 inches. How many gallons of milk must be removed? (1 cu ft = 7.5 gallons)  Choose the correct answer
A) 100	B) 250	C) 750	D) 5437.5	E) 5635.5

Rationale: "6 inches = 1 / 2 feet ( there are 12 inches in a foot . ) , so 58 * 25 * 1 / 2 = 725 feet ^ 3 of milk must be removed , which equals to 725 * 7.5 = 5437.5 gallons . answer : d ."
Answer: D