Suppose a store wanted to illustrate its policy on noncash customer
purchases.
Each of the three conditions (sale under $50, pays by check, and uses
credit cards) has only two alternatives. The two alternatives are Y(yes, it’s
true) or N (no, it’s not true).
Four actions are possiple:
Ring up the sale
Look up the credit card number in a book before ringing up the sale
Call the supervisor for approval
Call the bank for credit card authorization