we will add the price of the purchases
[tex]22+30=52[/tex]The total price is $52.00
now to calculate the save or 20% we multiply the total by 20 and divide between 100
[tex]\begin{gathered} \frac{52\times20}{100} \\ \\ \frac{1040}{100}=10.4 \end{gathered}[/tex]The save will be $10.40
