Actor Actions: 1. Customer selects item to purchase 2. Customer adds item to cart 3. Customer proceeds to checkout 4. Customer enters shipping and payment information 5. Customer confirms order 6. Customer requests prices for items

System Responses: 1. System displays item details and price 2. System adds item to cart and displays updated cart 3. System displays checkout page with order summary 4. System verifies payment information and confirms order 5. System sends confirmation email to customer 6. System displays prices for requested items

Actor Actions: 1. Staff member selects supplier 2. Staff member selects item to order 3. Staff member enters quantity to order 4. Staff member confirms order

System Responses: 1. System displays list of available suppliers 2. System displays list of items available from selected supplier 3. System verifies quantity and confirms order 4. System sends order confirmation to supplier and updates inventory.