1. Draw a DFD to reflect the exception routine of handling purchase returns and allowances
2. a. Purchasing a technical product that could not be inspected in the receiving department but had to undergo quality control testing before being accepted.
b. Purchasing goods through an online auction site, so that the price changes each time a purchase is made.
c. Making payments twice per month, on the fifth and twenty-fifth of the month, and taking advantage of all cash discounts offered.