Final answer:
Heidi earned an 8% commission by selling $640 worth of jewelry. To find how much the store made, we calculate her commission ($51.20) but consider the full sales amount ($640) as the store's making, since we're not asked to subtract the commission.
Step-by-step explanation:
To find out how much the jewelry store made from Heidi’s sales, we need to calculate the total amount of sales before her commission is subtracted. Since Heidi earns an 8% commission on her sales, we can calculate the store’s earnings by dividing her commission earnings by the commission rate. Heidi sold $640 worth of jewelry, so her commission is 8% of that amount. The calculation to find the amount of commission she made is:
Commission earned = Total sales × Commission rate
= $640 × 0.08
= $51.20
This $51.20 represents the 8% commission Heidi has earned from her total sales.
The jewelry store’s earnings from Heidi’s sales would be the total sales minus her commission. However, since we are asked how much the store made from her sales, not what it earned after paying commission, we assume the full amount of sales as the store's making. Therefore, the store made $640 from her sales.