EBIT Sensitivity Stewart Industries sells its finished product for $$8\mathrm{.}45$ per unit. Its fixed operating costs are $$22,000,$ and the variable operating cost per unit is $$5\mathrm{.}19.$

a$.$ Calculate the firm's earnings before interest and taxes $($EBIT$)$ for sales of $9,000$ units.

b$.$ Calculate the firm's EBIT for sales of $8,000$ and $10,000$ units, respectively.

c$.$ Calculate the percentage changes in sales $($from the $9,000-$unit base level$)$ and associated percentage changes in EBIT for the shifts in sales indicated in part $($b$).$

d$.$ On the basis of your findings in part $($c$),$ comment on the sensitivity of changes in EBIT in response to changes in sales.

a$.$ The firm's earnings before interest and taxes is $

$($Round to the nearest dollar.$)$