These cost calculators are based on averages and I bet your company isn't average. The values that are provided should be used as guidelines. Similar to the ink mileage charts we used in the offset world, they can be used as a starting point, but in real-world practice, you must do your homework and calculate what the true costs are for your business and the type of work that you're producing. The bottom line: Use what your supplier gives you a guide or starting point, but be aware of your real-word numbers.