A factory wants to estimate the cost of personal protective equipment (gloves, face masks, face shields, etc.) given to their workers. The factory takes a random sample of 500 invoices. If the average cost is $678, with a standard deviation of $560, construct the 95% confidence interval for the cost of PPE.

***Round to the nearest dollar amount.

We can be 95% confident that the LOWER BOUND/LIMIT of our interval of costs of PPE is $_______.