food orders

hi guys, i been asked to create a site where children can order a dinner box service, im looking at wp-ecommmerce but it does not have the functionality without plugins, which plugins will extend the core install, i need to recieve email with the order on it only… details needed are which day which week number which dinner pack 1,2,or 3, which drink and which fruit, drop downs are fine but not all drinks cost the same ect and getting a week number is a problem without making it too complicated. The company are using small kiddy size sandwich buns so the parents may order 1,2,3 of them each with different topping, any ideas on how to tackle this or which plugs to use to extend wp-e.