The final price per mug will be 9.21USD. The increase is due to the listed mug size being larger than the one on the site and by including tax. The price will be lower though if over 40 mugs are ordered in the final purchase. At this rate that might be a viable option.
Finally shipping in U.S. should be the same as mentioned below. Thanks to all those who are currently interested and have emailed me already. For those who has not emailed me and I have their email on record I will make sure to send out a reminder a week or two from now. I am planning on allowing another month or so to finalize the orders.