calc says 50 000 kh/s.. has to be a mistake..

[peobsi]

 I just started lite coin mining today in the burnside pool. Calculator says im doin 50 000 kh/s ... but I just got one r9 290 in my build. It also says I will be using 30 000 W an hour which i find hard to believe if all I have is an 850 W PSU. Can anyone shed light on this? It says I will make like 10 000 dollars a month there is no way with this one card that ill make that... I have 50 % of the stales as well apparently...