DEVDOCS-5707: [Update} update sale price definition

docs/stencil-docs/developing-further/catalog-price-object.mdx

@@ -11,7 +11,7 @@ Merchants can use control panel options to set the following prices for a catalo
 | Default Price | This is the product’s standard store price. The **Excluding/Including Tax** indicator to the right of the **Default Price** field is applicable to all price fields (**Cost**, **MSRP**, **Sale Price**).|
 | Cost | The product's `cost` property is never returned to the storefront by design. Generally, merchants would not want to reveal the true cost of goods to shoppers. The **Cost** field is meant for reports and third-party accounting integrations.|
 | MSRP | This field contains the manufacturer's suggested retail price, a price recommended for the sale of an item in all retail outlets. |
-| Sale Price | This field is the product's reduced store price. |
+| Sale Price | This field is the product's reduced store price. A sale price set to zero will result in a $0 charge to the shopper. |
 
 
 These options and assigned values are each represented in the catalog price object, allowing theme developers to pull the information and render it onto the storefront to highlight the savings offered by a merchant.