New guy LOST !!!!

[AE340B]

HI, folks-
I just returned from another pool store with a full water test. Here's the results:

Free Chlorine: 0.5
Total Chlorine: 0.5
pH: 7.4
total Alkalinity: 50
Calcium Hardness: 140
CYA: 0.0

I guess the question now is, what do I add, in what order, and how much? Again, the pool is a vinyl liner 44,000 gallon pool. I think I know why the CYA is gone - I had a leak in the solid cover all winter that allowed the water from the pool to seep up onto the cover, after which the automatic cover pump would dump it all overboard. I had to keep refilling my pool all winter. I would guess that all in all I replaced the vast majority of my water this past winter, 12" at a time! Will the use of the 3" pucks bring the CYA up to where it needs to be, or do I need to add some stabilizer now? I'd hate to raise it to normal levels now, only to have the pucks push it over the edge and have to drain the pool later in the year to bring it back down. The water is still only 56 degrees, if that matters. I think I may be at the point now where I'm starting to see a glimmer of knowledge, but it's just enough to be a danger to myself. Sherra, thanks for the info. Where do I go to download this bleach calc formula? As far as the solar cover, I'm gone alot but my wife and two kids are still here when I'm gone, and the kids are in the pool almost every day. My kids and I basically overuled my wife's objections to the pool when we bought it so she has no strong interest in helping me to maintain it. That's why I need the auto chlorinator. The kids are still to young to maintain the pool in my absence. Also, if anyone has answers to my shock questions asked in the post above I'd certainly be appreciative. As I said earlier, I'm still lost, however I feel that slowly I'm starting to learn. Thanks again to all of you for your help so far. I look forward to the time when I know enough that I can return the favor by helping another who is lost as I am now.
Doug