Introduction A local home improvement store has a sales system, (we will call it Sales501) to keep track of all financial transactions (in this case sales, returns, and rebate transactions). During different months of the year, the store has different promotions, for instance, in the month of June, the store has a 11% rebate in all purchases made in June. The promotion specifies that all rebates must be mailed no later than July 15th. As most of our stores, customers can return any item they purchase. You are to implement some functionality of the Sales501 system that handles the following use cases: Create sale transaction. - A transaction is created when a customer checks out at a cashier. A transaction may include one or many items. Return item(s). - A sale transaction is edited to reflect the items returned by the customer Enter rebate. - When the Rebates office receives a rebate on the mail, a rebate is entered in Sales501 for later generate the refund check to be sent to the customer. Generate rebate check. - At the end of the month of July, the Finance department runs the system to generate all the rebates refunds checks Assignment Requirements Introduction A local home improvement store has a sales system, (we will call it Sales501) to keep track of all financial transactions (in this case sales, returns, and rebate transactions). During different months of the year, the store has different promotions, for instance, in the month of June, the store has a 11% rebate in all purchases made in June. The promotion specifies that all rebates must be mailed no later than July 15th. As most of our stores, customers can return any item they purchase. You are to implement some functionality of the Sales501 system that handles the following use cases: Create sale transaction. - A transaction is created when a customer checks out at a cashier. A transaction may include one or many items. Return item(s). - A sale transaction is edited to reflect the items returned by the customer Enter rebate. - When the Rebates office receives a rebate on the mail, a rebate is entered in Sales501 for later generate the refund check to be sent to the customer. Generate rebate check. - At the end of the month of July, the Finance department runs the system to generate all the rebates refunds checks Assignment Requirements