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A paint shop sells spray cans at a flat charge of 50 cents per can. If a customer bought 10 cans and the owner decided to give that customer a special discount on the last two cans, what was the price of the two discounted cans?
Price of 10 Cans= 50*10=500 cents
Price of 8 non discounted cans= 50*8=400 cents
Price of 2 discounted cans= ?

(1) The customer paid four dollars and twenty cents total for the ten cans.
Customer paid 420 cents for 10 cans.
So, price of 2 discounted cans = 420-400=20 cents
Sufficient

(2) The customer bought the ten cans for an average price of 42 cents per can.
Customer paid 420 cents for 10 cans.
Price of non discounted cans=400 cents
Price of discounted cans= 420-400=20 cents
Sufficient

Answer: D
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