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.
The cost of goods sold expense depends directly on the product cost from the summary of manufacturing costs that appears below the income statement. A business may manufacture 100 or 1,000 different products, or even more, and the business must prepare a summary of manufacturing costs for each product.