Happy juice is on sale in the 3-quart 8-ounce size for $7.28. The sale price for super juice in the 2-quart 9-ounce size is $5.84. Which brand is more expensive per ounce?

Start with

one quart = 32 oz

So

3 qt 8 oz = 3+8/32 qt = 3.25 qt

2 qt 9 oz = 2+9/32 qt = 2.28125 qt

Unit cost of Happy Juice = $7.28/3.25 qt = $2.24 per quart

Unit cost of Super Juice = $5.84/2.28125 qt = $2.56 per quart

Leave it to you to decide which juice is more expensive.