Are you looking for the load calculation for service or just an as is situation. If it was residential it would be 3 watts per sq ft but in commercial it is 180 per recepticle and if a duplex that is 360 watts. And that does not mean it will work out ok. Loads on receptacles are seldom fixed and subject to change.
I may be wrong, Jim, but I think a duplex is still 180 va. Take a look at 210.14(I)
I believe you are correct, but its 220.14(I).