How do you calculate water supply fixture units?
At the 3/4" main you look at everything beyond that (i.e. everything, for this question.) 

Everywhere else you look at everything beyond that - so once you pass the Tee for the kitchen, the 1/2" side feeding the kitchen is looked at for the kitchen devices, and the 1/2" side feeding the half-bath and bar sink is looked at for those devices.