The unit price per ounce of the pineapple juice can be calculated by dividing the total cost by the number of ounces:
Unit price per ounce = Total cost / Number of ounces
Unit price per ounce = $3.50 / 16 ounces
Unit price per ounce ≈ $0.21875
So, the unit price per ounce of the pineapple juice is approximately $0.21875. (I think)