help me

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help me

by sana.noor » Mon May 13, 2013 4:56 am
An electronics salesman earned a x% commission on each of the m digital music player he sold in the month of March at the retail price of $p. In April, he earned a y% commission on sales of the same item, and the price remained the sale. If y > x and he sold q more digital music players in April than in March, how much more money did he earn selling digital music players in April than in March?
(A) p/100 [ym - x(m + q)]
(B) p/100 [x(m + q) + ym]
(C) p[y(m - q) - xm]
(D) p/100 [x(m + q) - ym]
(E) p/100 [y(m + q) - xm]

OA is E
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by mkdureja » Mon May 13, 2013 5:09 am
GIVEN:
Retail Price Number of Sales % Commission
March p m x
April p m+q y

Money he made in March = p * m * x/100
Money he made in April = p * (m+q) * y/100

Difference = p/100 * ( (m+q)y - mx)
E.