I understand if inventory increases, regardless of sales (suppose sales is zero for easier understanding, so there is zero revenue), it means cash has been used so it affects CFO (cash flow from operating activities). For example, if the ending inventory is worth $100, and the beginning inventory is $80, $20 has to be deducted from Net income when calculating CFO using the indirect method;
However, if the ending inventory is worth of $60, and the beginning inventory is $80, it means $20 worth of inventory was sold. But isn’t this reflected in “revenue” and “COGS” already in the income statement? Why do we have to add $20 to net income?
Thank you for any insight!