I work 8-5, so yes, I realize apple is open during these hours. I know they are open until roughly 6 or 7pm. It's the after 5pm hours, and sat/sun hours I'm interested in. So I can plan my week.
An air gap for a dishwasher is a requirement set forth by local plumbing codes. It is a device designed to ensure water flows only in the right direction during the dishwasher cycle. As a dishwasher operates, hot water flows in from the sink's hot water connection.
That gap between the frame of the lower sash and the window on the upper sash needs to be filled. If your air conditioner comes with a foam seal, you can cut it to size and slip it in place. If your foam filler disappeared during the winter while the air conditioner was in storage, you can buy them separately.