<prompt> Human: Hello! Im a 22 year old young professional figuring out bills and life. But my latest crisis is my electric bill sky rocketing. I lived in my first apartment 1 bedroom apartment in the city from December to June and my bill never rose above 40. I just moved to a 2 bedroom in the suburbs July - nowAugust and my electric bill was 140! Now in my new apartment i have a dishwasher and 2 ac units one portable 8k btu and one in the wall that looks older I have no idea its btuthat run 8hoursday minimum. I may leave one on all night on accident every once in a while. Im wondering if the ac useage is what skyrocketed my bill?I had the one portable ac unit in my old apartment from May to June and my bill didnt change at all. I was concerned because I know having an ac should show some change but I wasnt going to call about not being charged enough lol. Would love some feedback! Am I paying for the whole building aka they made an error or does this seem like an appropriate cost?EDIT: Thanks for all the answers! After calling my electric company they notified me since they estimate the usage every other month, and the fact my apartment was vacant this time last year, this bill is really for two months worth of electric. Still seems kind of high but with the one ac unit being older that may be the culparte. Im going to leave that one off for the month and see if I notice a difference  <response>: 2 ac units that run 8 hoursday minimumYep, thats why. Environmental control AC and heat are the two biggest expenses. Youve got more volume to cool down with the new place. Most AC units will draw anywhere from 1500 to 5000 watts - so every hour an AC unit is running, youre spending depending on locale anywhere from 20 cents to 60 cents. At 8 hoursday, youre probably spending about 3-4day on AC at least. 