Answer:
103.24 dollars
so first you find how many slices he sold
for mushroom he sold 6 pizzasz so that is 60 slices
next we need to find how many slices for perpronice so then 7*8 because 7 pizas and 8 slices that is 56
then 56+60 is 110
then you do 116*.89 and equalls 103.24