There is a spreadsheet publically available. The short answer is that the way kickstarter works, 65% of whatever you take goes back out as rewards,fees,etc and It takes ~250k to tool up for manufacture. Other kickstarter hardware projects try to strategise by asking low, hoping to overshoot the goal. In truth, a lot of Kickstarter projects ask for much less than they really need to succeed and deliver. We took a risk and decided to be totally honest.