You own a large building with $300$ small salon studio that you lease at a rate of $$750$ per month per unit. When the studios are $80\%$ occupied, monthly operating costs total $$140,000,$$$80,000$ of which are variable costs. A nearby university is opening up and there is an expected demand increase for your studios. You expect to be able to operate at $85\%$ capacity. Based on the cost behavior of the current studio rental business, what is the predicted monthly operating income when $85\%$ of units are leased out?

$40,000$

$$191,250$

$$46,250\mathrm{.}85$

$$144,999\mathrm{.}15$

Cannot determine from information provided.