This section contains the detailed task steps for all of the use-case happy paths.
Customer calls and orders a guitar and supplies, and pays with a credit card
Customer supplies customer number.
Customer is acknowledged as current.
For each product that the customer desires:
Extended order total is calculated.
Tax is applied.
Shipping charges are applied.
Extended price is quoted to the customer.
Customer supplies credit card number.
Customer's credit card is validated.
Inventory is reduced.
Sale is finalized.