SOLUTION: A one month supply of Multivitamins cost $28. A two month supply cost $49. How much money is a guest saving by purchasing a two month supply?

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Question 301897: A one month supply of Multivitamins cost $28. A two month supply cost $49. How much money is a guest saving by purchasing a two month supply?
Answer by helpnalgebra(91) About Me  (Show Source):
You can put this solution on YOUR website!
if he buys multivitamins for two months separately, it costs him 2 times $28 = $56... but as a whole, it only costs him $49.... he saved $7 per 2 months.... which means $3.5 per month...