To find the best buy based on the cost per unit (cost per ounce), we need to calculate the cost per ounce for each jar of peanut butter.
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14 ounces for $1.47: \[ \text{Cost per ounce} = \frac{1.47}{14} \approx 0.1050 \text{ dollars per ounce} \]
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22 ounces for $2.05: \[ \text{Cost per ounce} = \frac{2.05}{22} \approx 0.0932 \text{ dollars per ounce} \]
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28 ounces for $3.30: \[ \text{Cost per ounce} = \frac{3.30}{28} \approx 0.1179 \text{ dollars per ounce} \]
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36 ounces for $4.03: \[ \text{Cost per ounce} = \frac{4.03}{36} \approx 0.1112 \text{ dollars per ounce} \]
Now let's summarize the cost per ounce for each option:
- 14 ounces: $0.1050
- 22 ounces: $0.0932
- 28 ounces: $0.1179
- 36 ounces: $0.1112
Based on these calculations, the jar with the lowest cost per ounce is the 22 ounces for $2.05, at approximately $0.0932 per ounce. Therefore, it is the best buy.
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