Quantity A - Difference between C.I. and S.I. is given by = P (100r​)2 P (100r​)2 = 81 P (10015​) × (10015​) = 81 P = 3600 Quantity B - Let Cost price be 100 Marked price = 145 Discount = 20% Selling price = (100 - 20) % of 145 = 116 Now, 116 = 4060 Then, 100 = (1164060​) × 100 = 3500 Hence, Quantity A > Quantity B