Yeah, I think you need to revisit your calculation.
In 170 days you make 170 *.65 = $110.
How much did in invest?
Instead of buying another drive, I just spent $150 on Burstcoins at $.03. So, 5000 burstcoins. Kinda puts me ahead in the game if it moons

You will get to 5000 coins in 400 days!
You guys are absolutely right, my calculations were wrong. I had there 1/170 of cost returned, not days to ROI. So now I corrected it:
Days mining: 11
BURST per day: 25.87
USD per day: 0.68
ROI: 0.62%
100% ROI in [days]: 1788

EDIT: I also just bought 5537 BURST for 1 LTC.
