how much less is their cost than their selling price for each ball

Question

a sports store pays $380 for a case of 144 baseballs. the store sells the baseballs for $4.75 each. how much less is their cost than their selling price for each ball? 

Answer 1

We need to know how much the store paid for each ball.  We can find this by computing $380/(144 balls) = $2.64/ball (rounded).

 

The mark up (or how much less than their selling price) is $4.75-$2.64=$2.11