Fill in the missing amounts in each of the eight case situations below. Each case is independent of the others. $($Hint: One way to find the missing amounts would be to prepare a contribution format income statement for each case, enter the known data, and then compute the missing items.$)$

Required:

a$.$ Assume that only one product is being sold in each of the following four case situations:

$\backslash$table$[[,$Case #$1,$Case #$2,$Case #$3,$Case #$4],[$Unit sold,,$18,600,,,,12,400,,7,440],[$Sales$,$$$,223,200,$$$,124,000,,,$$$,372,000],[$Variable expenses,,$148,800,,,,86,800,,],[$Fixed expenses,,$62,000,,39,680,,,,124,000],[$Operating income $($loss$),$r$,,$$$,9,920,$$$,14,880,$$$,(12,400)$