oscom mysql edit

In oscommerce mysql - need an edit in mysql table so that it ignores + / - prefixes on product attribute price settings... so the ACTUAL attribute price option is used as the item price There is a contribution which is supposed to show and use the actual price option attribute. i.e By Default oscom uses a + £xx or - £xx to base price ... but it does not work properly. I have had on another site someone do a quick mysql table edit / rule so that it ignores the = / - function and just uses the figure in the attribute setting.