Wow, it's explained the reason of your electricity bill
Your A/C is power hungry, 2600w
But I think you can share more info and we can help you in a better way to reduce your electricity consume
Is it necessary to turn on the A/C?
Most cases you can solve the problem with fans, good airflow and undervolt.
as replied above,
i just wanna find a way to exhaust some of the hot air out of the apartment, simply opening windows doesnt help much !...
You need to create airflow... just opening the windows for exhaust in a box isn't going to do it...