bob is having a party and wants to order cakes. There will be 57 guests and he wants everyone to get a slice of cake. he wants to pay as little as possible.
How much will he have to pay for the cakes?
1st cake is:
20cm cake.
Serves.
12 people
Cost
£13.50
2nd cake
25cm cake
Serves.
20 people
Cost
£18.75.
Please can somebody help me work this out.