Carcass wrote:
In the first week of February, a bookseller sold x copies of a new arrival for the retail price $y per copy. The following week, she sold 50% fewer copies, each at a discounted rate of 20% off the retail price. In terms of x and y, what was her total revenue from both weeks of selling the new arrival?
(A) 0.1xy
(B) 0.4xy
(C) 0.6xy
(D) 1.1xy
(E) 1.4xy
First week, x copies at $y, total = $xy
Next week, 50% of x at 80% of the y = 0.5x * 0.8y = 0.4xy.
Total = $xy + $0.4xy = 1.4xy.
Answer is E)