ALTER TABLE `newshipments` 
ADD COLUMN `extra_charges` DECIMAL(10, 2) DEFAULT 0.00 AFTER `price_per_container`,
ADD COLUMN `extra_charges_notes` TEXT NULL AFTER `extra_charges`;

ALTER TABLE `newshipments` 
ADD COLUMN `extra_charges_vat_type` ENUM('added', 'reverse') DEFAULT 'added' AFTER `extra_charges_notes`;