A company manufactures a certain product in which the fixed cost is $$80,000/$month$.$ The variable cost is $$92/$ unit. If the selling price $/$unit is set at $$220-0\mathrm{.}025D$ determine the followings

Optimum number of units you advise the company to sell$/$month$?$

The number of units the company must sell to break even?

If the total investment is $2,010,000JD($depreciation is $0)$ and the company selis $2500$ unit$/$month$,$ determine the pay back periods in months assuming IRR$=0\%?$

If the total investment is $2,010,000JD($depreciation is $0)$ and the company sells $2500$ unit$/$month$,$ determine the pay back periods in months assuming IRR $2\frac{\%}{?}$ month?