Bayport Bottles $($BB$)$ exclusively buys and sells a variety of glass and plastic bottles

nationwide. Each type of BB inventory has a unique item number, BB maintains several warehouses for housing its inventory items, and each warehouse serves a distinct region within the United States. An individual sale or purchase can consist of multiple kinds of inventory items. For each sale or purchase event, all items are in stock such that delivery of items takes place in an essentially immediate manner. Data about an inventory item is added to the database when a potential supplying vendor is located for the new item, and each type of inventory item in

the database pertains to at least one vendor with corresponding price quotation information. Furthermore, each quoted price for each product from each vendor is kept current in BB$$s database. Vendors may supply many products and often establish minimum quantity levels for quoted items. Also, a given product may be provided by many vendors. Finally, vendor performance ratings are computed on a monthly basis using a combination of pertinent metrics,and these ratings are used Each customer is added to the database and assigned to a particular salesperson at the time an

initial sale occurs, and most salespeople serve a multitude of customers. In addition, salespeople

are compensated on a commission basis, and this commission amount may vary from employee

to employee. Vendors are not assigned to any particular buyer, so buyers may purchase from

any vendor in the database. Also, buyers are paid on a salary basis, and the annual salary level

may vary from employee to employee. Each event involves, at most, one employee and one

outside agent. Each employee is added to the database immediately upon being hired, vendors

are added to the database before any transactions occur with them, and the database maintains a

rating measure in real$-$time for each customer so that decisions pertaining to issues such as credit

limits and discount terms may be made in a more timely, accurate, and informed manner. Also,

BB tracks employees by position in the database, and does not use a generic employee class to

represent all employees.

Cashiers handle cash receipts and disbursements, are bonded for insurance purposes, and are

paid on an hourly basis at various, individualized rates. In performing their duties relative to

collections, they put all the cash receipts from any one given business day into a single bank

account, but multiple bank accounts exist for depositing cash receipts over time. New cash

accounts are added to the database as they are opened.

Some purchases are paid for immediately at the time of purchase with a check drawn on a single

account, but most purchases are made on credit terms. When purchases occur on credit terms,

the policy is that BB pays each such vendor on the $25$th of the current month for all purchases

made during the previous month using a single check, and one checking account is used for all

purchasing activity. On very rare occasions, partial payments might be made to vendors for

legitimate reasons. Each sale is made on credit terms, each customer pays the balance due in full

on the $15$

th of the present month for all sales during the previous month using a single payment

instrument. Finally, assume all cash receipts pertain to sales and all cash disbursements pertain to purchases.

Required:

Using the narrative above and the data listing that follows on the next page, construct a

UML class diagram in good form with all classes, attributes, associations, and multiplicities

clearly specified and labeled.

Data Listing:

accountType, creditLimit, eventDate,

agentNumber, warehouseForThisInventory, quantityOfItemSold,

annualSalary, totalSaleAmount, bankAccountNumber,

unitPurchasePrice $,$warehouseLocation, outsideAgentPhoneNumber,

accountsPayableBalance, checkAmount, agentName,

expirationDate, quantityOnHand $,$inventoryReorderThreshold,

totalPurchaseAmount $,$unitPriceQuote, invoiceNumber,

minimumQuantity, quantityOfItemPurchased, cashAccountBalance,

cashReceiptAmount, rating, hourlyWage,

itemColor $,$checkNumber, accountsReceivableBalance,

vendorForThisPurchase, unitSellingPrice, itemNumber,

insuredValueOfInventoryAtWarehouse, averageUnitCost,