Develop an I-P-O chart and a flowchart. Select a common sales transaction, such as an automobile gasoline purchase or a grocery store purchase. Analyze the transaction and make a list of the pieces of information that are input, the processing that takes place as part of the transaction, and the resulting output. Record your analysis in the form of an I-P-O chart as shown in this chapter, then sketch a flowchart of the transaction. Compare the information communicated in the I-P-O and flow diagrams. Which do you prefer? Explain why.