Oscommerce Expert to Fix Sales Bug

I had a developer enable my specials functions and it was working, but some minor fix applied at a later point by him, is causing an issue. Becaus I cannot reach him, I am posting this as a new project. The issue seems to happen when adding an item that is not on sale to the cart. Items are priced by attributes in this shopping system. Here's a breakdown of the issues found that are all related: 1) Cart amount (just above the currency selection) is showing 0 even after I add items that are NOT on sale. Items on sale are showing properly 2) [login to view URL] - The Grand Total shown in the cart after I add an item shows 0. Items on sale are reflected in the total. So again, items not on sale are the issue. 3) When I try to checkout and I have at least one item that is not on sale in the cart, I get the message: Fatal error: Call to undefined function: attributes_price() in /includes/classes/[login to view URL] on line 229 The developer originally needed to fix specials so it would work with attribute based pricing (all products do not have a base price and pricing is done with attributes). It was working, but in the process of making another fix, he must have caused the issue. As you know osCommerce's "specials" only allow to set one price. So admin will only puts a product on sales if it has just one attribute price. So the fix applied needs to ensure that Sales works properly in all areas of the system. There are currently about 16 modifications to the cart (May or may not have an impact on Gift Vouchers or Coupons). Budget is $30 as I do beleive this is an easy bug (I would be willing to go higher if justification is made).