Alright, I have verified that my master_categories are correctly assigned. I guess that I am attempting to use user exits to do this category wide discounting.

What I am trying to do for instance is the following:

Items in (master)Category #28 are $6.95 each. Purchasing 4 or more takes the price to $6.00 each.

Items in (master)Category # 29 are $17.95 each. Purchasing 2 or more takes the price to $17.00 each.

This kind of discounting goes throughout the product line.

http://www.pheniks.net/zen/ is my test/development site.

My settings for quantity discounts in admin are:



I have corrected my user exits in ot_qtydiscounts.php to the following:
Code:
function apply_special_category_discount($category, $count, &$disc_amount) {
        switch($category) {
           case 28: // 4 OZ Country Samplers Quantity Discount
                if ($count > 4) {
                   $disc_amount = 13;
                }
                break;
           case 29: // 16 OZ Flip-Top Quantity Discount 
                if ($count > 2) {
                   $disc_amount = 10;
                }
                break;
           case 30: // 24 OZ Flip-Top Quantity Discount
                if ($count > 2) {
                   $disc_amount = 8;
                }
                break;
           case 31: // 32 OZ Flip-Top Quantity Discount
                if ($count > 2) {
                   $disc_amount = 14;
                } 
                break; 
        }
    }
Appreciate the assistance!