alter table change_orders add chargeable tinyint(3) unsigned not null default 0 after date;

alter table change_orders add cost decimal(11, 2) unsigned not null default 0 after date;

alter table change_orders add taxable tinyint(3) unsigned not null default 0 after chargeable;

alter table invoices add change_order_cost decimal(11, 2) unsigned not null default 0 after item_cost;