Charlie and David are at the school canteen buying food.
Charlie bought two burgers and 3 soda cans, paying $9.30
David bought 4 burgers and 5 soda cans, paying $17.10
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Charlie and David are at the school canteen buying food.
Charlie bought two burgers and 3 soda cans, paying $9.30
David bought 4 burgers and 5 soda cans, paying $17.10