This looks really cool. I put in some numbers for a service that I am considering, and the answer was the opposite of what I was intuitively expecting, which proves the need for something like this.

Some feedback:

- s/(one person)/(per person)/g - The "cover costs" section doesn't really make sense to me. For example, in one example, the breakdown says that I will burn $10000 extra, but that I will also cover costs with 23 hours of use. How does it know how much use it will take to cover costs? How does it know how much profit is generated per hour of use? Am I misunderstanding something? - It would be nice if the formula used was displayed in small text or in a tooltip or something.