A merchant marks his goods up by 30% and then offers a discount of 20% on the marked price. What % profit does the merchant make after the discount? Choices.
A) 8 %	B) 10 %	C) 21 %	D) 15 %	E) 4 %

Rationale: "let the price be 100 . the price becomes 130 after a 30 % markup . now a discount of 20 % on 130 . profit = 104 - 100 4 % answer e"
Answer: E