the cost for an adult admission is 22 $
cost for child is 22 - 5 = 17 $
total cost for 12 adults is 12 x 22 = 264
total cost for 15 children is 15 x 17 = 255
so the total cost of admission for 12 adults and 15 children is,
= 264 + 255
= 519 $
so the answer is 519 $