This modification allows you to show that your store price is lower than the manufacturer's suggested retail price. If your price is the same as or higher than the MSRP then the MSRP will not be displayed. The customer's savings will also be displayed if it applies. Savings is based on the MSRP if it applies or on the selling price if a sale price is in effect.
 

* you can donwload the contribution from oscommerce.com for free