A store’s selling price of $2240 for a certain computer would yield a profit of 40 percent of the store’s cost for the computer. What selling price would yield a profit of 60 percent of the computer’s cost?
Select:  A) $ 2400  B) $ 2464  C) $ 2560  D) $ 2732  E) $ 2800

Rationale: "1.4 x = 2240 x = 2240 / 1.4 so , 1.6 x = 2240 * 1.6 / 1.4 = 2560 answer : - c"
Answer: C