Ehm you subtracted the electricity cost three times. Unfortunately, most gold sellers pay way less, closer to 3 cents per platinum, but maybe I just haven't met the right folks for that yet. I know I have in wow, but those same people either pay between 2 and 3 cents for my server or they are "overstocked" or they don't buy any at all because 'moar goldz' doesn't seem to be where it's at in rift (not just yet anyway), not as much as is the case for wow where you can basically buy anything from boe/bop (raid spots) gear over real actual love to mounts and even a whole guild including 100s of soldiers serving at your command for moar goldz.
Plus, the electricity cost where I live is closer to €.3 than €.11. Pretty rough and among the reasons why I gave up farming bitcoins, just not worth it anymore.