Ben, thanks for your reply. This is my first time maintaining a pool, up until 3 weeks ago we used a pool service to maintain the chemicals.

1 & 2: The depth ranges from 3ft to just over 7ft.
3: According to the mfg each 40lb bag adds 240ppm to a 10,000 gallon pool. I used Diamond brand pool salt from Lowes.
4: The test kit I used was a Taylor K-1766 that I just purchased from Amazon.

Today is the first day that I had enough time to get up to speed on testing & adjusting the water. So using a Taylor K-2006C and the salt kit mentioned above, I got the following results:
FC: 0 (the water did not turn pink when adding the powder so I stopped there)
CC: 0
pH: 8
TA: 80
CH: 280
CA: 90
Salt: 3000

Then using the pool calculator I plugged the numbers in and entered 10,000 gallons for the pool (to be on the safe side). It recommended adding 83oz of bleach to got from 0 to 4 which brought the FC up to 2.8 an hour later. So if my assumptions are correct and I did the math right I should have a 16,000 gallon pool. As for the salt, the only thing I can think of is the pool company dumped some in at some point of time.