The Love-Pet Company is a 100-store retail chain concentrated in Ontario, Quebec, and Nova Scotia that sells fresh pet food supplies which their products have short to medium shelf-life. Each store has a full-time manager and assistant manager who are paid a salary base. The cashiers and sales personnel are working as part time and hourly based plus a commission based on sales volume. The company employs simple cash registers which use invoices to record each transaction. These sales invoices are used irrespective of the payments type including cash, cheque, or credit cards. On the sale floor, the salesperson manually records his/her employee number and total transaction (quantity of packages, unit prices, and description), total sale invoice, calculate the discount, if appropriate, calculates the tax, and for the small business check the credit scores. The salesperson gives the sale invoice to the cashier and store one copy to the sale book. The cashier reviews the invoice and enter the sale. The cash register manually validate the invoice and then automatically, assigning a number to the transaction. The cashier is also responsible for getting credit approval on charge sale and approving sales paid by cheque. Then casher gives one copy of