By selling an umbrella for Rs. 300, a shop keeper gains 300%. 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.
A) 1000	B) 1100	C) 1150	D) 1300	E) 1200
Marked price = Rs. 200   C.P. = 100/400 * 200 = Rs. 25   Sale price = 90% of Rs. 200 = Rs. 180   Required gain % = 300/25 * 100= 
<gadget id="calculator">300/25 * 100</gadget>
<output>1_200</output>
1200%.   Answer:1200
<result>E</result>
By selling an umbrella for Rs. 300, a shop keeper gains 300%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?