Tricky Question - But the key is to, as always, understand the question inside out
Given
Cash Discount - 20%
Profit - 20%
Items Sold - 16
Price Sold at = List Price of 12
Assume List price = $10
Total Invoice = $120
-20% Cash Discount = $96
Let cost price of 16 items be x
So total cost = 16*x
Given the shopkeeper had a profit of 20%
16 * x * 120/100 = 96
or x = $5
Which means his products were listed at $10 which is a 100% markup over $5
Answer A
Given
Cash Discount - 20%
Profit - 20%
Items Sold - 16
Price Sold at = List Price of 12
Assume List price = $10
Total Invoice = $120
-20% Cash Discount = $96
Let cost price of 16 items be x
So total cost = 16*x
Given the shopkeeper had a profit of 20%
16 * x * 120/100 = 96
or x = $5
Which means his products were listed at $10 which is a 100% markup over $5
Answer A