Differential Analysis In each of four independent cases, the amount of differential revenue or differential cost is as follows (parentheses indicate decreases): 1 2 3 4 Increases (decreases) in: Revenue $36,000 $0 ? Costs ? ? $(20,000) $0 For each case, determine the missing amount that would be necessary for the net differential amount to be: a. $22,000 Use a negative signs with answers to reflect decreases. 1 2 4 Increases (decreases) in: Revenue $36,000 $0 $ Costs $(20,000) $0 b. ($9,000) Use a negative signs with answers to reflect decreases. 1 4 Increases (decreases) in: Revenue $36,000 $0 $ Costs $(20,000) $0 Check