Answer:
$2.34
Explanation:
Cost of 4 boxes
The cost of 4 boxes must be the difference between the total and the strawberries
total-strawberries
12.25-2.89=9.36
4 boxes costs $9.36
Cost of 1 box
You bought 4 boxes for $9.36, and each box costs the same, so we can divide the cost by the number of boxes
cost/boxes
9.36/4=2.34
Each box of cereal costs $2.34