I'm working on some standardized calculations for that question.

For your pool, it works out roughly like this:
  • Water: $100 (varies a LOT from location to location)
  • Electricity: $61 ($0.14/kwh - 12 hrs/day)
  • Pump Timer: $25.00
  • Testkits: $85.00
  • Dichlor: $65.00
  • Bleach: $60.00
  • Borax + Acid: $20

1st Yr Total: $316.00
2nd year will be reduced somewhat, but you'll need to buy some kit refills and some filter cartridges.

Lots of cautions here:
  • A single episode of algae can DOUBLE chemical costs
  • Usage assumes BBB method (as taught here)
  • Pool store methods can TRIPLE chem costs!
  • Testkits and timer should last multiple years.
  • Dichlor will last at least 2 years (Sams Club 24# box)
  • Bleach assumes Walmart in your area is carrying FRESH Pool Bleach
  • Water costs may be less; electricity may be more.

If you are interested, I'll post a recipe with links.