When you are about to offer a product for the first time, how do you know whether or not you will make a profit? After all, there are huge variables to consider and advertising isn't cheap.(Google)
A lot of companies do not make a profit but that does not make them non profit. Making a profit (called "margins" in non profit parlance) does not make you a "for profit" company either - you can make margins and still be non profit.(WebCorp)
Now that you have some idea what it costs to put on a performance, you can determine what it takes just to meet expenses, and from there see what it takes to actually make a profit. (WebCorp)