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Mathematics, 16.12.2021 17:50 ehamilton3

Tom bought a pen for $60 and sold it to gain 20% on his cost price. How much money did he gain? a) $12
b) $40
c) $72
d) $80

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Tom bought a pen for $60 and sold it to gain 20% on his cost price. How much money did he gain? a)...
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