The tracking was easy. I purchase bleach in bulk (time constraints). Each time I purchased something, it was written on the spreadsheet. Next year, the cost will be a lot less as I plan on cutting back (from average of 8 hours per day) to about 6 hours per day. The first month at most is 4 hours per day and last month is 4 hours per day. In between, I will adjust to 8 hours per day. At most, I am looking at 7 hours per day (average).
The system is oversized with 2" plumbing and a 2 hp. pump, 350 lb. sand filter. The turnover rate at 12 hours is 2.5X, which is overkill. Especially now, that I know how much electricity really costs. Always pegged it at $100 per month, which is pretty accurate.
The true cost savings (which I forgot) is the opening and closing of the pool (Which of course I do now). Only once did they close the pool and that was enough. The PB cost would be $240 to open and $260 to close, totaling $500. This is the cost of electricity, so a wash.
The amount of time spent weekly on pool (30 minutes at most), which includes vacuuming, testing and bleach additions, etc. The amount of time to open pool and close pool (1 hour each). We will not discuss the total cost of the swimming pool (ouch!)