need sequence diagram An office supply distributer has a set of criteria for preparing bills. When any user such as customer places the order, a sales staff member prepares the order and also writes...

need sequence diagram

An office supply distributer has a set of criteria for preparing bills. When any user such as customer places the order, a sales staff member prepares the order and also writes the bill. If the quantity of items on hand is insufficient, the back order is placed for missing items. The items that are available are shipped and then the bill is prepared. The cost for the back order is billed, when they are shipped. Customers can be of two types; wholesale customers can get any discounts regardless of the number of items ordered. Retail customers will pay sales tax, while wholesale customers don’t have to pay any tax given that their tax exemption application is approved. All bills are sent to the customers.