Final answer:
The unit price per box of cereal is $2.25.
Step-by-step explanation:
To find the unit price per box of cereal, you divide the total price by the number of boxes. In this case, the grocery store sells 8 boxes of cereal for $18.00. So, you would divide $18.00 by 8 to get the unit price per box.
Unit Price per Box = Total Price / Number of Boxes
Unit Price per Box = $18.00 / 8
Unit Price per Box = $2.25
Therefore, the unit price per box of cereal is $2.25.