This list contains all customer names and addresses and is indexed on the zip code. As a new customer is processed the customer is assigned a credit limit and a credit rating. The former is assigned by the credit manager and the latter is provided by another company which does credit checks. Customers who buy wholesale are given a special discount rate based upon the volume of business they gave to Acme during the last calendar year. So for each such customer you must keep a special discount rate and the purchases to date for this year as well as the total purchases for last year.
Seeds are for different plant types and for each plant type, there are many varieties.
Hence seeds are characterized by their plant type and variety jointly. Each seed variety of each plant type has just two Acme selling prices - a wholesale price and a retail price. The description is usually a scientific name and any aliases known to the company. The same variety identifiers may be used for identifying varieties of different plant types. These bins are large wooden boxes which are left empty outside the warehouse when not in use.