Answer
The cheapest bottle is $0.99 for 30 oz. bottle.
Step-by-step explanation
The way to determine the cheapest bottle per ounce is to find the price per ounce for each of these bottles.
The different bottles and their price include
$1.25 for 25oz,
Price per ounce = (1.25/25) = $0.050 per ounce
$1.50 for 25oz,
Price per ounce = (1.50/25) = $0.060 per ounce
$0.99 for 30oz,
Price per ounce = (0.99/30) = $0.033 per ounce
$1.20 for 30oz,
Price per ounce = (1.20/30) = $0.040 per ounce
$1.10 for 22oz
Price per ounce = (1.10/22) = $0.050 per ounce
We can see that the cheapest option here is the $0.033 per ounce.
Hence, the cheapest bottle is $0.99 for 30 oz.
Hope this Helps!!!