please explain step by step

Example #8 compute Cost of Goods Manufactured and Cost of Goods Sold using the following information: Beginning of Year End of Year Raw Materials Inventory $25,000 $28,000 Work in Process Inventory $50,000 $35,000 Finished Goods Inventory $25,000 $18,000 $78,000 Purchases of Direct Materials $82,000 Direct Labor $15,000 Indirect Labor $9,000 Insurance on Plant $13,000 Depreciation - plant building and equipment $4,000 Repairs & Maintenance - plant $77,000 Marketing Expenses $29,000 General & Admin. Expenses