A magazine costs $3 each. Jewel bought 10 magazines to be sold at $3.50 each. How much will be Jewel gain from selling these?
Jewel's gain for each magazine is $3.50 - $3 = $<<3.5-3=0.50>>0.50.
Thus, her total gain will be $0.50 x 10 = $<<0.50*10=5>>5.
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