Need a comprehensive walkthrough on how the numbers were found for each question mark listed in the photo. Thank you so much!

LO2, 3 E2-3A. Product Cost Flows Complete the following T-accounts: Materials Inventory 320 ? 18,120 250 Wages Payable 9,000 300 Work-in-Process Inventory 1,000 ? ? 9,000 ? Finished Goods Inventory 1,500 ? ? 1,200 500 Cost of Goods Sold ? Manufacturing Overhead 50 ? ? 18,000 4,500 0