Did the water have time to mix well before testing? That's key. You may have a layer of rainwater on top that hasn't mixed. If so... How does the water look? If it's green or there's any algae, you want to SLAM. For that, you want things balanced but keep CYA to about 30 until you're done with it.
Next question: what chemicals do you have on hand? If you have any leftover Cal-hypo from before you discovered TFP, you can use that to chlorinate until the CH is up where you want it.
Otherwise, get bleach in first. Then mess around with the CYA and the sock. Then it's your choice whether you add baking soda or Calcium next. Too many chemicals too close together could cause some cloudiness, so space them apart a couple hours, and don't freak out if it happens. It will clear up in a day or two.
