A person incurs 10% loss by selling a watch for $100. At what price should the watch be sold to earn 10% profit?  Choose the correct choice from the following answers
A) $100	B) $122	C) $150	D) $210	E) $170
Let the new selling price be $x   (100-loss%): (1st S.P.) = (100+gain%):(2nd S.P.)   (100-10)/100 = (100+10)/x   x = 110*100/90 = 122 approximately   Answer is $122
<result>B</result>
A person incurs 10% loss by selling a watch for $100. At what price should the watch be sold to earn 10% profit?