First, read the following case on differential analysis. （PDF）
Then, review the following files on this topic.（PPT）
Finally, complete the following assignment.（excel）
Samantha Charleston (responsible for the analysis on the electronic check processing) became ill and asked you to complete her analysis. She has identified relevant costs and benefits. However, you need to complete Steps 4, 5 and 6 of the Decision Making model. Charleston asks that you finish her spreadsheet above. Provide your answers in the second tab of the spreadsheet, making sure to include calculations and explanations where appropriate.