A sales clerk enters item codes until the entire customer’s purchases are recorded. The subtotal, taxes and total amount due are calculated. The customer can choose to pay with cash or a credit card. If the customer chooses to pay by credit card, a credit check is done. If the customer’s credit card is declined or the customer has insufficient cash, the sale is voided. If the customer can pay, the payment is recorded and a receipt is issued to the customer.Draw a context diagram for the scenario above
Customer
- Make Purchase
Sales Clerk
- Enter Item Codes
- Calculate Subtotal, Taxes, Total Amount Due
- Record Payment
- Issue Receipt
Payment System
- Credit Check
- Record Credit Card Payment
- Record Cash Payment
- Void Sale if Credit Card Declined or Insufficient Cash