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.
Since a period cost is essentially always charged to expense at once, it may more appropriately be called a period expense. A period cost is charged to expense in the period incurred. This type of cost is not included within the cost of goods sold on the income statement. Instead, it is typically included within the selling and administrative expenses section of the income statement. Examples of period costs are: 1  Selling expenses.