[Plugin: Events Manager] Displaying total price

Hello,
I want to display the total price (if someone want to buy more than one ticket)on the single event page. I`ve found on events-manager/classes/em-tickets-bookings.php and ../em-ticket-booking.php that: Gets the total price for this whole booking by adding up subtotals of booked tickets. Seting $force_reset to true will recheck spaces, even if previously done so. Is that the right script?
I set “true” but nothing changed. In Germany we have to display the total price with all additional costs (like delivery charges) before someone clicks on the booking-button. So, please help me otherwise I can`t use this wonderful plugin.
Another problem: We send tickets to home I’ve someone wants. That costs delivery charges. How can I manage that this costs will be added to the booking price?