A family went out to dinner. The cost of their meal was $57.50, before sales tax and tip. A sales tax of 8% was added.
The family then tipped 18% on the amount after the sales tax was added.

Part A:
What was the amount, rounded to the nearest cent, of just the sales tax?

Part B : What was the total amount the family paid , including tax and tip , rounded to the nearest cent ?

PLEASE HELP