5. A store sells milk in three different sizes. The 128 fl oz size costs $4.59. The 64 fl. oz container costs $329. And, the 32 oz container cost $1.99. Which size has the lowest price per fluid
ounce?

128 divided by $4.59 = 27.88671023965142
64 divided by $329 = 0.19452887537994
32 divided by $1.99 = 16.08040201005025

Therefore, the size which has lowest price per fluid ounce is 32 fl. oz container .

You're just suppose to divide the fluid oz and the cost for all the sizes,which ever has the lowest price is the answer.