Final answer:
The unit rate at Target is $0.136 per eraser, and the unit rate at Shopko is $0.119 per eraser. The best buy is the pack of erasers from Shopko as it has the lower unit rate.
Step-by-step explanation:
The student is asking to calculate the unit rate for each option of erasers to determine which is the best buy. A unit rate is the cost per single item or unit.
To calculate the unit rate for the pack of 26 erasers at Target costing $3.54, you divide the total cost by the number of erasers:
- Unit rate at Target = $3.54 / 26 erasers = $0.136 per eraser
To calculate the unit rate for the pack of 35 erasers at Shopko costing $4.15, you do similarly:
- Unit rate at Shopko = $4.15 / 35 erasers = $0.119 per eraser
Comparing the two unit rates, the pack of erasers at Shopko has the lower unit rate, meaning it's the cheaper option per eraser, and therefore the best buy.