I bought two books; for Rs.480. I sold one at a loss of 15% and other at a gain of 19% and then I found each book was sold at the same price. Find the cost of the book sold at a loss?  Choose the correct answer:
A) 327  B) 280  C) 277  D) 216  E) 287
x*(85/100) = (480 - x)119/100   x = 280   Answer: 280
<result>B</result>
I bought two books; for Rs.480. I sold one at a loss of 15% and other at a gain of 19% and then I found each book was sold at the same price. Find the cost of the book sold at a loss?