your radio buttons are passing the pricce increment value.
read my last post again
you should have a table that has the price increment and description text in it.
the radio buttons should pass the ID that relates to the price increment / description combination in the database.
use a lookup recordset that looks up the ID value passed by the radio button, in the add to cart behavior, bind the price increment to the recordset price column and bind the description to the recordset description column.
it would help you to set up a simpler cart for testing to get familiar with the concept before jumping into the complex cart you have.