In generak, how much will profits increase for every unit sold over the break even point?

It depends on the rate of increase... I'm asuming this is an economics post for school? Post the question then you will get tha answer.

In general, how much will profits increase for every unit sold over the break even point?

See this post for the same question, with an answer: https://www.askmehelpdesk.com/accounting/break-even-point-80226.html