Nicky is trading baseball cards with Jill. If Nicky trades two cards worth $8 each for 1 card worth $21, how many dollars of profit does he make?
First find the total cost of the two $8 cards: $8/card * 2 cards = $
<gadget id="calculator">8*2</gadget>
<output>16</output>
16.
Then subtract the cost of the cards Nicky gave away from the cost of the card he received to find his profit: $21 - $16 = $
<gadget id="calculator">21-16</gadget>
<output>5</output>
5.

<result>5</result>