To find the price per ounce for each grocery store we have to divide the price by the size of the bottle:
Hawkin's Grocery:
[tex]\frac{5}{20}=0.25[/tex]$0.25 per ounce
MItchell's Store:
[tex]\frac{8}{25}=0.32[/tex]$0.32 per ounce
Selena's Market:
[tex]\frac{12}{40}=0.30[/tex]$0.30 per ounce
Teresa's Store:
[tex]\frac{20}{100}=0.20[/tex]$0.20 per ounce
We can see that Teresa's Store has the lowest price per ounce