Final answer:
The store made $191.52 from selling 798 erasers by first finding the unit price ($0.24) and then multiplying it by the number of erasers sold.
Step-by-step explanation:
To find out how much money the store made from selling 798 erasers, you first need to calculate the price of one eraser. You do this by dividing the total cost for 7 erasers by the number of erasers, which is 7. So, $1.68 divided by 7 is $0.24 per eraser. This is the unit price of each eraser.
Once the unit price is known, you can calculate the total earnings from selling 798 erasers. Multiply the unit price by the total number of erasers sold: $0.24 multiplied by 798 equals $191.52. Therefore, the store made $191.52 from selling 798 erasers.