The way in which commission is calculated is: D. (selling price) times (percent commission).
In Economics, the amount of commission earned on the sales of a product can be calculated by multiplying the selling price (sales price) of the product by the percent commission (commission rate) that is approved to be paid to an agent or sales person, by the employer or business owner.
Mathematically, the amount of commission earned on the sales of a product can be calculated by using this mathematical expression:
Commission = Percent commission × Selling price
In this context, we can reasonably infer and logically deduce that the commission earned on the sales of a product can be calculated by using option D.
Read more on commission here: brainly.com/question/24951536
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