Problema Solution

You plan to mail surveys to different house holds. A box of 50 envelopes costs 3.50, and a postage stamp costs 0.42. How much will it cost to mail 400 surveys

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You plan to mail surveys to different house holds. A box of 50 envelopes costs 3.50, and a postage stamp costs 0.42. How much will it cost to mail 400 surveys

SOLUTION - the cost to mail 400 surveys  = (400/50)*3.5 + 0.42 = 28+0.42 = 28.42