looking for a revenue calculator

I’ve been searching all day for a revenue calculator. It seems every calculator I have found has at least one missing component. I need the calculator do be able to do the following:

1 boat cost (this is a flat number) $8000
X how many boats the customer wants to buy (this would be the first calculation, and this is also the first field the customer would be able to type in a number)
$ amount the customer would charge for their tour (say, $50)
Cost of labor per hour (what the client pays their employees per hour)

The final result should show 3 things: investment, revenue, and profit.
there is a great example of this on the website peterdiving.com/business, although they have a couple of other steps in play.
Thank you!

The page I need help with: [log in to see the link]