I would like to see an option to add a "service fee" to the checkout on stores built for customers. This service fee would help cover admin fees that are not neccisaryly included in the products being sold. This function should automatically be added to the order when the customer checkouts similar to the way ticketmaster charges a convenience fee. The option for a flat fee or percentage of the total order would be good. This would help with other requests for a reimbursement of the CC processing charges paypal and other companies charge.