An audio commentary is an additional audio track, usually digital, consisting of a lecture or comments by one or more speakers, that plays in real time with a video. Commentaries can be serious or entertaining in nature, and can add information which otherwise would not be disclosed to audience members.[1]
In accounting terms, operating expenses, or OE, and cost of goods sold, or COGS, are both considered expense accounts. In short, they measure different ways in which resources are spent in the process of running a business.
Some of your expenses may be included in figuring the cost of goods sold. The cost of goods sold is deducted from your gross receipts to figure your gross profit for the year. If you include an expense in the cost of goods sold, you cannot deduct it again as a business expense.