The amount allowed off the cost price of an article to stimulate patronage is

The amount allowed off the cost price of an article to stimulate patronage is called a "trade discount." Trade discount is a reduction in the list price of a product or service offered by a seller to its buyers, with the aim of encouraging bulk purchases or patronage. It is a discount that is deducted from the original selling price before an invoice is issued. Unlike a cash discount, which is given to a buyer for paying an invoice within a specified time period, a trade discount is not tied to the payment terms. Instead, it is given as a reduction in the published price of a product or service. Discount on debt is a reduction in the amount payable by a debtor to a creditor for settling a debt before the due date. Discount on bills, also known as "bill discounting," is a method of borrowing money in which a business sells its accounts receivable or invoices to a third party at a discount to obtain immediate cash.