Final answer:
To calculate the lower bound for the total profit, assume every car sold had a profit of $2420 and multiply it by the number of cars sold.
Step-by-step explanation:
To calculate the lower bound for the total profit, we need to determine the minimum possible profit per car sold.
Since the average profit is $2430, correct to the nearest $10, we know that the actual profit per car sold can be higher or lower than $2430.
The lower bound for the total profit can be calculated by assuming that every car sold had a profit of $2420. If we have the number of cars sold, we can multiply it by $2420 to find the lower bound for the total profit.