Marvin and Tina were selling candy bars to help fund their class trip.  The candy bars cost $2 each.  Marvin sold 35 candy bars total.  Tina sold three times the number of candy bars as Marvin.  How much more money did Tina make for the class trip selling candy bars compared to Marvin?
Marvin sold 35 candy bars at $2 each so 35 * 2 = $<<35*2=70>>70 worth of candy
Tina sold three times the amount of candy so $70 * 3 = $<<70*3=210>>210 worth of candy
If Tina sold $210 worth of candy and Marvin sold $70 in candy then 210 - 70 = $<<210-70=140>>140 more sold than Marvin
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