Math question here.

I have an issue regarding labor costs for my small business. I've never posted to /sci/ before. Hopefully there's some algebra guys here too.

So here's my dilemma. I need an equation or way to calculate a break even type of point analysis regarding labor. Currently the 4 owners of the business are the sole variable labor costs at a tune of $37 per unit sold. We could hire someone to do the same labor at a cost of $27 per unit sold.

Due to the nature of business, with the owners performing labor the income per unit is $77 per unit. For the new labor in question the income would be $85 per unit. There's approximately 550 units to be distributed amongst all laborers per month.

It's there a way to calculate a point in which profits left over from the reduction in new labor costs would offset the loss of income of owners from the lower workload?

Can /sci/ help me analyze something like this or should I go elsewhere?

Pic unrelated