The Price store tag can be modified to display an item's price in two ways.
Let's say you add an item with an ID of 10 to Catalog Manager, and this item is available at a price of $10.99. You have the following choices when creating the Price store tag.
Version 1
<!--#ystore_catalog id="10" field="price" -->
Using this store tag would display your item's price in the following way:
10.99
Version 2
<!--#ystore_catalog id="10" field="price" format="html" -->
Using this store tag would display your item's price in the following way:
$10.99