Justin bought some jerseys. He bought four long-sleeved ones that cost $15 each, and some striped ones that cost $10 each. How many striped jerseys did Justin buy if he spent a total of $80?
Four long-sleeved jerseys cost $15 x 4 = $
<gadget id="calculator">15*4</gadget>
<output>60</output>
60.
So the striped jerseys amount to $80 - $60 = $
<gadget id="calculator">80-60</gadget>
<output>20</output>
20.
Hence, Justin bought $20/$10= 
<gadget id="calculator">20/10</gadget>
<output>2</output>
2 striped jerseys.

<result>2</result>