quantity qiscounts and decimals

``i sell some products by the sq. ft. so a box might be 24.028 if they buy it by the pallet (quantity Discounts) which is 1321.54 per pallet but when adding a decimal to quantity discounts the quantity discounts dont show. this is what i have in tpl product info display

<!--bof Quantity Discounts table -->
<?php
if ($products_discount_type != 0) {
   $qty_discounts = $db->Execute("SELECT * FROM " . TABLE_PRODUCTS_DISCOUNT_QUANTITY . " 
                                  WHERE products_id = " . (int)$_GET['products_id'] . " 
                                  ORDER BY discount_qty ASC");

   $discount_lines = array();
   $actual_price = zen_get_products_actual_price((int)$_GET['products_id']);

   while (!$qty_discounts->EOF) {
       $bulkqty = $qty_discounts->fields['discount_qty'];
       $discount_price = zen_get_products_discount_price_qty((int)$_GET['products_id'], $bulkqty);
       
       if ($discount_price < $actual_price) {
           $unit = ($calculator == 1 || $calculator == 2) ? 'SqFt' : 'ea';
           $percent = round($qty_discounts->fields['discount_price']);
           
           // Calculate Cash Savings: (Normal Price - Bulk Price) * Quantity
           $savings_per_unit = $actual_price - $discount_price;
           $total_saved_cash = '$' . number_format($savings_per_unit * $bulkqty, 2);
           $price_fmt = '$' . number_format($discount_price, 2);
           
           // Format: "500+ SqFt: $2.49 (Save 10% — $125.00 total)"
           $discount_lines[] = "<strong>{$bulkqty}+ {$unit}:</strong> {$price_fmt} <span style='color:#28a745;'>(Save {$percent}% — {$total_saved_cash} total)</span>";
       }
       $qty_discounts->MoveNext();
   }

   if (count($discount_lines) > 0) {
       echo '<div class="qty-discounts" style="font-size: 0.95em; margin: 15px 0; border-left: 4px solid #28a745; padding-left: 12px; line-height: 1.5;">';
       
       if (count($discount_lines) === 1) {
           echo 'Bulk Discount: ' . $discount_lines[0];
       } else {
           echo '<div style="margin-bottom:5px; text-transform:uppercase; font-weight:bold; font-size:0.8em; color:#666;">Volume Savings:</div>';
           echo implode('<br>', $discount_lines);
       }
       
       echo '</div>';
   }
}
?>
<!--eof Quantity Discounts table -->

thanks for looking

Your Zen Cart version? How are these products and their quantity discounts configured?