e-commerce. having product in basket to start

Hi. With my site anyone wishing to use my service has to have a basic package costing £12.99 per month - they can then add on different services to this. I havent been able to find a way where the £12.99 is in the basket from the start - so it doesnt have to be selected by a customer as is there automatically (and a cust could then checkout if didnt want any add-ons) is this possible?