The financial records for the Lee Manufacturing Company have been destroyed in a fire. The following information has been obtained from a separate set of books maintained by the cost accountant. The cost accountant now asks for your assistance in computing the missing amounts. Direct Materials Inventory BB $8,000 Purchases $16,400 EB $6,400 Transferred out ?? WIP Inventory BB $7,500 Materials $18,000 Labor $13,500 Overhead $8,000 Cost of Goods Sold EB $57,000 Finished Goods Inventory BB ?? Transferred In $39,500 EB $4,200 Transferred Out ?? EB ?? Transferred Out ?? What is the amount of the materials purchased?