You typically buy all of your groceries at Grocery Mart. This week, your
favorite cereal is on sale there, 4 boxes for $10. At Food Market,
where you don't typically shop, the same cereal is on sale for $2.25 a
box.
a) What's the unit price at Grocery Mart?
b) What is the unit price at Food Market?
c) Based on price, which is the better value option?