How large is this UP order?

The rash of UP AC4400CW's (I think that is the correct model) that have been leaving Erie for Frontier to go west durning the last week, just how large is this order?

we must had missed them. We were at Erie PA last Friday, only thing we saw were sea of oranges...good 10-20 of them sitting inside the plant. and only active thing went on was GE 5000 (red and silver) and SP 134 doing some sort of testing..