For the sake of simplicity, let's assume curators get no part of the payout (which isn't the case). Half of your payout will be payed as SBD. So for a $40 post, you'll get 20 SBD and $20 worth of Steem Power. The value of SBD fluctuates a lot, but right now, 1 SBD is worth $2.54.
That means you'll earn $50.80 worth of SBD (20 SBD) and $20 worth of Steem Power, for a total of $70.80.
it's sad this guy ruined his own Steemit account in one day, all because they don't understand how the payout and bidding system works. He did not lose money, he did not get scammed. He did spam hundreds of posts calling people scammers which got his account downvoted to zero rep in one day.