Bowlin,
80 #s of salt will bring the your 27K pool to 355 ppm of salt. If you review other postings I think most people settle around 1000ppm which would be 225 llbs of salt. I would add 1/2-3/4 of the 225#s to see how it feels and then slowly approach the 1000ppm. It's easier to add than remove salt! Use Michael's BleachCalc for additional measurements.