By selling an umbrella for Rs. 300, a shop keeper gains 30%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?	Select
A) 25%  B) 22.2%  C) 28.57%  D) 23%  E) 24%
Marked price = Rs. 300   C.P. = 100/130 * 300 = Rs. 210   Sale price = 90% of Rs. 300 = Rs. 270   Required gain % = 60/210 * 100 =28.57%.   Answer: 28.57%
<result>C</result>
By selling an umbrella for Rs. 300, a shop keeper gains 30%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?