The following information is available about the August transactions of the Helpful Tool Company: Invoices for product costs paid during the month $493,000 Product costs charged to Work in Process $737,000 Cost of finished goods manufactured $718,000 Cost of goods sold $739,000 a) What is the amount of product costs to be deducted from sales revenue in August? (X marks) b) What would the result of this calculation be, and what it represents?.