A man purchases 2 watches for $ 500. 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) $ 260 and $ 300  B) $200 and $ 300  C) $224 and $336  D) $560 and $560  E) $224 and $ 350
x + y = 500 --- (1)   1.15x + 0.9y = 500 --- (2)   (2) - (1) --&gt; 0.15x - 0.1y = 0   15x = 10y   x/y = 2/3 = (2*100)/(3*100) = 200/300   Answer: $200 and $ 300
<result>B</result>
A man purchases 2 watches for $ 500. 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 :