Consider the following production$-$oriented project. The units produced will sell for $$28/$unit and can be produced at a variable cost of $$20/$unit$.$ Fixed costs are $$80$K$.$ The purchase price for the project is $$200$K$,$ depreciable down to zero over a four$-$year life. The project has no salvage value. Ignore taxes, but use a $10\%$ required return when evaluating this project.

$($a$)$ Calculate the accounting break$-$even quantity.

$($b$)$ Calculate the cash$-$flow break$-$even quantity.

$($c$)$ Calculate the financial break$-$even quantity.