Answer:
$81 is your overall total
Explanation:
First you would multiply $15 dollars by Audrey's 3 kids; After you did that then you would do her 3 kids multiplied by $4 for snacks but have to multiply it again by 3 cause they get 3 to share. You should end up with $45 and $36 once you get those two totals you add them together and get the overall number cost of $81.