How do u do 5 pounds 4 ounces for $26.88 what’s the cost per ounce

First you have to turn pounds into ounces and its 16 oz for 1 pound.

Now you need to multiply 16 by 5.
16×5=80

Now you add the 4 oz to the 80 oz.
80+4=84

Now you need to divide $26.88 by the 84 oz.
26.88÷84=0.32 

Then you finally get $0.32 per 1 oz.

I really hope that helped : )