Posted by **Frances** on Thursday, September 23, 2010 at 10:15am.

Add up all of the weights for your prepackaged items and then add up all of the costs for your four prepackaged items.

From the totals, find the average cost per ounce of prepackaged items. Convert your results to cost per pound; using proportions will help. [Hint: How many ounces in a pound?]

Now, compare the cost per pound of unprocessed food compared to prepackaged processed food. Amazed?

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