By selling an umbrella for Rs. 300, a shop keeper gains 20%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?	Choose the correct choice from the following:
A) 7%.	B) 9%.	C) 8%.	D) 2%.	E) 3%.
Explanation:   Marked price = Rs. 300   C.P. = 100/120 * 300 = Rs. 250   Sale price = 90% of Rs. 300 = Rs. 270   Required gain % = 20/250 * 100= 
<gadget id="calculator">20/250 * 100</gadget>
<output>8</output>
8%.   Answer: 8%.
<result>C</result>
By selling an umbrella for Rs. 300, a shop keeper gains 20%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?