How to calculate ending work in process inventory. Has a beginning work in process inventory for the quarter of $10,000. Cost Of Goods Manufactured Cogm - How To Calculate Cogm Let’s use a best coffee roaster as an example. Opening work in process inventory formula . It doesn’t account for manufactured goods pulled from inventory due to damages/defects or manufacturing costs such as scrap and waste. A) calculating opening direct materials inventory; Opening inventory formula this results in a simple calculation to find opening inventory. Formula to convert operating income to net income. The slight difference between the calculation and the exact value is simply disregarded. The work in process formula is: Raw material goes through three stages in a manufacturing process: Budgeted sales qty x sp. Determine the cost of goods sold (cogs) with the help of your previous accounting period’s records. When you are ready to calculate work in process inventory, yo...