930 watts...approx 18.65 cents per hour of running time
What will make the big difference is in how long it runs daily, how well insulated the room is, and how much the temperature differential is (ambient room temp vs. desired temp)
IF the unit runs 12 hours per day (solid, non-stop total run time, it will cost about $2.25 per day...of course, without knowing all the variables, YMMV...and my calculations are only based on rated wattage and your advertised electric rate per KWh, so it's only close, not dead accurate.