A store’s selling price of $2,240 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 50 percent of the computer’s cost?
A. $2,400
B. $2,464
C. $2,650
D. $2,732
E. $2,800
Ans: A
解題:2240:0.4 = X:0.5
0.4X=1120 , X=2800 ==> 答案是E
