Add amount and profit in exchange window

[kosoviccorp]

When enter amount and price on the right should be amount.
After that costs should be listed like in accounting

Amount x Price = Gross

- Transport amount x sourcing cost of transport / unit = Transport costs

- 3% fee 
- cost of goods sourcing

=Estimated  profit

Example

1000 🍎 x $2 = $2000
-$360 (1000 transport x 0.36 )
- $60 ( 3% of  $2000)
-$1300 ( sourcing)
= $280 ( estimated profit)

I believe this is easy function which will allow player to check his costs and profits fast