James is having a party. He has worked out how much food he needs to buy per person and goes to the shop to buy the things he needs.
Per person:
-3 slices of pizza
-25g of crisps
Crisps come in 300g packets
8 Slices per pizza
James is expecting 15 people to be there including himself
How many pizzas and packets of crisps does he need to buy?