Final answer:
Dr. Stu's profit is calculated by subtracting total costs from total revenue, which results in a profit of $312.
Step-by-step explanation:
To calculate Dr. Stu's Dentistry's profit, we need to determine the total revenue and total costs from the sale of the false teeth. The profit is then found by subtracting the total costs from the total revenue.
First, calculate the total revenue by multiplying the number of false teeth sold by the price per tooth: 52 false teeth * $84 each = $4,368 in total revenue.
Next, calculate the total costs by multiplying the number of false teeth sold by the average total cost per tooth: 52 false teeth * $78 each = $4,056 in total costs.
Finally, subtract the total costs from the total revenue to find Dr. Stu's profit: $4,368 - $4,056 = $312.
Therefore, Dr. Stu's profit is $312, which corresponds to option C.