Explanation:
Calculate the cost per ounce of each can by dividing the cost of the can by the size of the can.
For example, $0.89 / 10 oz = $0.089/oz.
The 15oz can has the lowest cost per ounce.
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![\left[\begin{array}{ccc}Size&Cost&Cost\ per\ ounce\\10 oz&\$0.89&\$0.089/oz\\15 oz&\$1.29&\$0.086/oz\\18 oz&\$2.26&\$0.126/oz\\32 oz&\$3.39&\$0.106/oz\end{array}\right]](https://img.qammunity.org/2021/formulas/mathematics/college/4t9h4clui8zpf966bn7rtgb76is16dpbri.png)