A person incurs 10% loss by selling a laptop for $900. At what price should the watch be sold to earn 10% profit?  Choose the correct choice from the following choices
A) 1200  B) 1000  C) 1100  D) 1050  E) 1250
Let the new S.P. = x   then (100-loss%): (1st S.P.) = (100+gain%): (2nd S.P.)   (100-10)/900 = (100+10)/x   x=110*900/90= 
<gadget id="calculator">110*900/90</gadget>
<output>1_100</output>
1100   new price= $1100   correct option is 1100
<result>C</result>
A person incurs 10% loss by selling a laptop for $900. At what price should the watch be sold to earn 10% profit?