Matt can buy key chains in packs of 10 for $20 or in packs of 4 for $12. How much money can he save if he chooses to buy 20 key chains at a lower price?
The cost of each key chain in packs of 10 for $20 is $20/10=$
<gadget id="calculator">20/10</gadget>
<output>2</output>
2.
The cost of each key chain in packs of 4 for $12 is $12/4=$
<gadget id="calculator">12/4</gadget>
<output>3</output>
3.
There is a price difference of $3-$2=$
<gadget id="calculator">3-2</gadget>
<output>1</output>
1 per key chain between the two choices.
By buying 20 key chains at a lower price, Matt can save 20x$1=$
<gadget id="calculator">20*1</gadget>
<output>20</output>
20.

<result>20</result>