A tradesman fixed his selling price of goods at 30% above the cost price. He sells half the stock at this price, one-quarter of his stock at a discount of 15% on the original selling price and rest at a discount of 30% on the original selling price. Find the gain percentage altogether?	Choose the correct choice:
A) 14.875%  B) 15.375%  C) 15.575%  D) 16.375%  E) 16.5%
Solution: Let CP = 100; then, marked price=130;   Now,   revenue = [(1/2)*130+(1/4)*0.85*130+(1/4)*0.7*130]   = 65+27.65+22.5 = 115.4;   % profit = 15.4*100/100= 
<gadget id="calculator">15.4*100/100</gadget>
<output>15.4</output>
15.4%.   Answer: Option 15.375%
<result>B</result>
A tradesman fixed his selling price of goods at 30% above the cost price. He sells half the stock at this price, one-quarter of his stock at a discount of 15% on the original selling price and rest at a discount of 30% on the original selling price. Find the gain percentage altogether?