$1.$ What is the Break$-$even point in units? $($Step$-$by$-$Step calculation is required$)$

$2.$ How much revenue at break$-$even point? $($Step$-$by$-$Step calculation is required$)$

The following ones are extended questions $($each is an independent case$)$: It is required to have a brief explanation to your answer. The explanation could be through calculation or definition of break$-$even point.

$3.$ If they sold $2000$ units, would they gain or lose profit?

$4.$ If they sold $3000$ units, would they gain or lose profit?

$5.$ If the fixed cost decreased by $$1,000,$ would the break$-$even point be higher or lower?

$6.$ If the direct labor cost increased by $$1,$ would the break$-$even point be higher or lower?