Answer :

So we need to figure out which is the best buy. In order to do this we must look at a particular variable: the price per ounce of peanuts. This price is given by dividing the total price of a certain amount of peanuts divided by its weight in ounces. So for the Barrel brand we get:

[tex]\frac{3.39}{10}=0.339[/tex]

So the Barrel peanuts cost $0.339 per ounce. For the Mr. Nut peanuts we get:

[tex]\frac{4.54}{14}=0.324[/tex]

Then the Mr. Nut peanuts cost $0.324 per ounce. Finally, the price per ounce of the Chip's peanuts is:

[tex]\frac{6.26}{18}=0.348[/tex]

Then, the cheapest peanuts are those of the brand Mr. Nut and that is the best buy.

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