Final answer:
To find the total amount of merchandise Emma had to sell, divide her total commission by the commission rate. She had to sell a total of $2400 worth of merchandise last month.
Step-by-step explanation:
To find the total amount of merchandise Emma had to sell, we need to divide her total commission by the commission rate. Since she earns 8% commission on all clothing she sells, we can set up the equation:
8% of Total Merchandise = $192
To isolate the total merchandise, we divide both sides of the equation by 8%:
Total Merchandise = $192 / 0.08
By evaluating the expression on the right-hand side, we find that Emma had to sell a total of $2400 worth of merchandise last month.