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.)

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

	Case #1	Case #2	Case #3	Case #4
Unit sold	9,000	14,900	20,500	5,000
Sales	$270,000	$298,000	$512,500	$160,000
Variable expenses	171,000	163,900	287,000	95,000
Fixed expenses	83,000	164,000	88,000	79,000
Net operating income (loss)	$16,000	$(29,900)	$137,500	$(14,000)
Contribution margin per unit	$11	$9	$11	$13

Required:

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

	Case #1	Case #2	Case #3	Case #4
Sales	$448,000	$208,000		$292,000
Variable expenses	264,320	143,520		90,520
Fixed expenses	117,000	56,000	467,000
Net operating income (loss)	$66,680		$101,620	$(15,520)
Average contribution margin ratio (percent)	41%	?????	81%