Obviously, I don't have access to those numbers, but there are many things they could do to make early openings and late closings more economical. The only guns (K3000's) they have that can blow snow in marginal temps are horribly inefficient, if they switched over to Ratnik guns it would cost about 25% of what it does now.
They could move the late closing to be back on Downdraft, as it's much narrower (which means less snow required), and holds snow much better than Superstar does.
Lifts that run every day:
I meant, which ones COULD be closed, not what they've actually done.