A man purchases 2 watches for $ 520. He sells one at 15% profit and the other at a loss of 10%. He neither gains nor loses on the whole. Thus, the cost price of two watches are :	Choose the correct choice from the following answers: A) $ 208 and $ 312 B) $210 and $ 350 C) $224 and $336 D) $560 and $560 E) $224 and $ 350
x + y = 520 --- (1)   1.15x + 0.9y = 520 --- (2)   (2) - (1) --&gt; 0.15x - 0.1y = 0   15x = 10y   x/y = 2/3 = (2*104)/(3*104) = 208/312   $ 208 and $ 312nswer: $ 208 and $ 312
<result>A</result>
A man purchases 2 watches for $ 520. He sells one at 15% profit and the other at a loss of 10%. He neither gains nor loses on the whole. Thus, the cost price of two watches are :