Answer :
Final answer:
Cathy's total revenue is $300 and her total cost is $40, resulting in a profit of $260.
Explanation:
Cathy's total revenue can be calculated by multiplying the selling price of $15 per pair by the number of pairs sold, which is 20. Thus, her total revenue is $300.
Her total cost can be calculated by multiplying the cost of creating each pair of earrings, which is $2, by the number of pairs sold, which is 20. Therefore, her total cost is $40.
To calculate profit, we subtract the total cost from the total revenue. Therefore, Cathy's profit is $300 - $40 = $260.
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