For figuring out what profit you may get from a 1% increase in conversions, use the form with the data you currently have, noting the calculated entries. Then run thru the calculation again and increase the number of conversions by .01 - note the change in Total Profit at the bottom, and other calculated pieces of the form.
Oops! We could not locate your form.
This idea for this metric analysis comes directly from a book by Brian Clifton
'Advanced Metrics with Google Analytics". All mistakes are my own.