Final answer:
To find the unit cost of each light bulb, divide the total cost of the package by the number of bulbs. In this case, each bulb costs $3.20.
Step-by-step explanation:
To calculate the unit cost of each light bulb in a package that sells for $12.80 per 4 bulbs, you would divide the total cost of the package by the number of bulbs in the package.
To find the unit cost of each light bulb, we need to divide the total cost of the package by the number of bulbs in the package. In this case, the package costs $12.80 and it contains 4 bulbs. So, the unit cost of each light bulb would be $12.80/4 = $3.20.
Unit Cost = Total Cost of Package ÷ Number of Bulbs in Package
Unit Cost = $12.80 ÷ 4
Unit Cost = $3.20
Thus, the unit cost of each light bulb is $3.20.