OSCommerce addon fix

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
Few months ago I have installed following addon: http://addons.oscommerce.com/info/1826/category,3/search,category+use+shopping+cart
Recently I have found certain problem. This should hide the price and purchase button from the catalog if no price has been entered, instead of showing a price of $0.00. But once I enter certain price (10$ for example) it will display 0$ instead of 10$
I need someone find a issue and correct the code.

Skills required:
OSCommerce, PHP
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