Differential Analysis In each of four independent cases, the amount of differential revenue or differential cost is as follows (parentheses indicate decreases): Increases (decreases) in: Revenue $19,000 $0 Costs $(11,000) $0 For each case, determine the missing amount that would be necessary for the net differential amount to be: a. $10,000 Use a negative signs with answers to reflect decreases. Increases (decreases) in: $19,000 Revenue $(11,000)