Answer:
They save 15 cents per cookie
Step-by-step explanation:
We got to find per cookie
[tex]\frac{1.6}{2}=0.8[/tex]
80 cents per cookie
[tex]\frac{7.8}{12} = 0.65[/tex]
65 cents per cookie
[tex]0.8-0.65=0.15[/tex]
They save 15 cents per cookie
I hope this helps