Answer:
total cost = $22
Step-by-step explanation:
given data
assistant coach earn = $13 per hour
admission fee = $9
solution
we get here total cost of skipping practice and going to the carnival is express as
total cost = assistant coach earning + admission fee .....................1
because here he losses a hour in work and additionally spending in carnival
so now put here value in equation 1 we get
total cost = $13 + $9
total cost = $22