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The lemonade problem

The lemonade problem

Book 2018

Peg and Cat are setting up a lemonade stand and decide to sell lemonade in exchange for ten marbles a cup. But the Teens say their price is too steep! So Peg and Cat keep changing their sign until they hit a price that has customers lining up. There's just one problem: Peg and Cat forgot the cups! Can they barter their way back into business - or will they end up totally freaking out?