###Human: 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?, ### Assistant: Four long-sleeved jerseys cost $15 x 4 = $60.
So the striped jerseys amount to $80 - $60 = $20.
Hence, Justin bought $20/$10= 2 striped jerseys. 
 So the answer is :  2