Profit is the next measure you will create. You may attempt to write something such as the following:
Profit = SUM('Internet Sales'[Sales Amount]) - SUM('Internet Sales'[Total Product Cost])
This calculation would be technically correct; however, it's not the most efficient way to write code. In fact, another benefit of building explicit measures is that they can be built on top of each other. Reusing existing calculated measures will make the code more readable, and make code changes easier and less time consuming. Imagine for a moment that you discovered that the Total Sales calculation is not correct. If you encapsulated all this logic in a single measure and reused that measure in your other measures, then you need only change ...
