Cost of heating question

Me and my roommates live in a 1,100 sqft two story house. I have voted not to use the heater since I’m used to the cold and usually just put on more layers, but they have voted to set the heater to 65 degrees for at least one hour each day, but probably closer to 6 hours a day (overnight). How much might this make our bill go up? Does anyone mind sharing how much they pay a month for heating? Thank you!