These are the answers to my assignment. Can anyone explain how factory overhead was calculated?i know what numbers were used to come up with it, but I'm just confused to why depreciation-factory machinery was left out?

Module 1: Chapter 2: Cost Flow (To be posted as a group assignment in your group discussion area) The following information for Transcontinental Inc. is provided. Use this information to answer the succeeding eight questions: aterials I Jan. 1 Jan. I (Jan 1) ork-in inished Goods I ost of materials purchased otal direct labor costs 36.70 27.100 office office Dee. 31) Dee inished Goods I 13.900 The sales for Transcontinental Inc. during this year were 1,050,000 and a total of 4,800 units were completed during the year. Compute the following for the year: 1. Cost of materials used? 2. Factory overhead? s. Total manufacturing cost? S197,300 S311,500 $677,100 Cost of goods manufactured?S670,500 s. Cost of goods sold? 6. Gross margin? 7. Net Income (Loss)? 8. Unit Cost? -$693.300 S356,700 S338,700 $141.06