Silly me ... found what you are using ...
Look in the usps.php shipping module and look at the code:
The $cost is what is being added to each charge and you want to adjust that for the Order Cost plus 3% ...Code:$methods[] = array('id' => $type, 'title' => $title, 'cost' => ($cost * $shipping_num_boxes) + (MODULE_SHIPPING_USPS_HANDLING_METHOD == 'Box' ? MODULE_SHIPPING_USPS_HANDLING * $shipping_num_boxes : MODULE_SHIPPING_USPS_HANDLING) );
would give you the order total ...Code:global $cart; $order_total_amount = $_SESSION['cart']->show_total() - $_SESSION['cart']->free_shipping_prices() ;
Add 3% to that then add that amount to the $cost ...



