confused I don't know how to solve this

Answer:
61.5
Step-by-step explanation:
asiago: 12h+7(1.50)=x . h=6
plug it in!
79(1.5)=x
x=118.5
plain: 7h-4(1.5)=x . h=6
plug it in again! :D
38(1.5)=x
x=57
find the difference!
118.5-57=61.5