Find the best buy for each item. Give the unit price to the nearest thousandth for that si...
Find the best buy for each item. Give the unit price to the nearest thousandth for that size. See Example 2. (Source: Jewel-Osco and HyVee.)
GRAPE JELLY
EXAMPLEFinding Price per Unit
A Jewel-Osco supermarket charges the following prices for a jar of extra crunchy peanut butter.
PEANUT BUTTER
PEANUT BUTTER | PEANUT BUTTER |
18 oz | $3.49 |
28 oz | $4.99 |
40 oz | $6.79 |
Which size is the best buy? That is, which size has the lowest unit price?
To find the best buy, write ratios comparing the price for each size jar to the number of units (ounces) per jar.
Because the 40-oz size produces the lowest unit price, it is the best buy. Buying the largest size does not always provide the best buy, although it often does, as in this case.
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