A school is buying new jackets and hats for its band members. Jackets cost $101 each and hats coat $44 each. The expression 101j+44h represents the cost of j jackets and h hats. How much will it cost to buy new jackets and 15 new hats?

If the expression 101j+44h represents the total cost you can find out how much they will cost by plugging in the number of jackets/hats they will be buying into the equation.

101(15)+44(15)
1,515+660

2,175

15 new jackets and 15 new hats would cost the school $2,175

If i think this is what your asking, he should look at the grams or pounds/ounces and compare the to their cost then max can identify which one is proportional and which is not ( i think xd)