Fill in the missing amounts in each of the eight case situations below. Each case is independent of the others.

Required:

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

b$.$ Assume that more than one product is being sold in each of the four following case situations:

Complete this question by entering your answers in the tabs below.

Assume that only one product is being sold in each of the four following case situations: $($Loss amounts should be indicated by a minus sign.$)$

$\backslash$table$[[,$Case $1,$Case $2,$Case $3,$Case $4],[$Units sold,,$9,600,,,,20,000,,5,900],[$Sales$,$$$,278,400,$$$,383,400,,,$$$,177,000],[$Variable expenses,,$172,800,,,,300,000,,],[$Contribution margin,,,,,,,,$],[$Fixed expenses,,$83,000,,175,000,,,,77,000],[$Net operating income $($loss$),,,$$$,9,600,$$$,100,000,$$$,(12,100)$