Calculate the din can be done on dinsettings or charts you find on the internet; it's not taboo to mention it. But what is taboo is assuming that the din value is not all the steps required in the binding check and being confident the bindings are working properly. Setting the forward pressure (and any other fit adjustments) then testing the release values on a machine are mainly what you're paying for, not looking up a number in a din table and turning the screws until the right number shows up.
2) Setting of bindings should be less than $30 at a premium and often times like $15-$20. $70 is a really high price. unless they really are ripping you off, they may have mistaken your request as setting up the bindings. Go to an area with more shops, even shops near or at the resort, where competition will help keep prices more fair. This is a job that is relatively quick they usually won't need your skis to be held overnight or anything like that-but be sure they are do the test on a machine.
I was talking with the local shop about getting (new) skis with bindings (elsewhere) and having them check them.. maybe he thought i meant install.. he mentioned something about system bindings requiring the shop to remove them and check them for insurance purposes and then said it was $75.. The other shop i normally go to, has done a "check" on bindings for me in the past which they charge $8.. maybe they would say the same on new skis with pre-mounted bindings (the others were older skis)? (in some cases they wont check bindings if they are old or not? on the indemnified list anymore, standard practice i think)
And there are a few rental shops near the slopes.. i can check with them and hopefully worst case they can "check" them, set the din in the early morning this weekend.. i definitely still want a pro to do a checkover.. (and just let them do the waxing since i'm short on time this week.. though i've gotten pretty good at doing waxing as of now).
On the actual din setting.. most din setting sites show an 8 for me (as with the old skis).. but for some reason the Dynstar pdf i found seems to show 6.5.. so it will be interesting to see what the shop sets it at.