Prairie Shoes Inc. manufactures and distributes orthopedic footwear. To sell its products, the marketing department requires sales personnel to call on the shoe retailers within their assigned geographic territories. Each salesperson has a laptop computer, which he or she uses to record sales orders during the day and to send these sales orders to Prairie’s network nightly for updating the company’s sales order file. Each day, warehouse personnel review the current sales orders in its file, and where possible, pick the goods and ready them for shipment. When the shipping department completes a shipment, it also notifies the billing department, which then prepares an invoice for the customer. Payment terms vary by customer, but most are net 30. When the billing department receives a payment, the billing clerk credits the customer’s account and records the cash received.

Requirements
1. Identify the resources, events, and agents within Prairie Shoe’s revenue process.
2. Develop an E-R diagram for this process.
3. With a particular DBMS in mind, design the tables for this revenue process.