Answer:
$77.50
Explanation:
Since each cookie cake feeds 6, she can buy enough cakes to feed 6, 12, 28, 24, 30, 36, etc. people.
The smallest number above 29 she can feed is 30.
Each cookie cake feeds 6.
30/6 = 5
She needs to buy 5 cookie cakes.
5 × $15.50 = $77.50