Final answer:
To calculate the unit cost of the potato chips, divide the total cost of $37.28 by the number of bags purchased, which is 8. This gives a unit cost of $4.66 per bag of potato chips.
Step-by-step explanation:
The student is asking to find the unit cost for a bag of potato chips. To determine the unit cost, we divide the total cost by the number of units purchased. In this case, Johnny bought 8 bags of potato chips for $37.28. Therefore, we divide $37.28 by 8 to get the unit cost per bag.
Unit Cost = Total Cost ÷ Number of Bags
Unit Cost = $37.28 ÷ 8
Unit Cost = $4.66
So, the unit cost for one bag of potato chips is $4.66.