human
John goes to the store to buy Slurpees and gives them $20. Slurpees cost $2 each and he got $8 in change. How many Slurpees did he buy?
assistant
How much did John spend? ** He spent 20-8=$<<20-8=12>>12 on Slurpees
How many Slurpees did John get? ** So he got 12/2=<<12/2=6>>6 Slurpees
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