The ‘iddah of a woman divorced by khula’ and her going back to her husband

Does Khul` Count as Talaq?

If they agree on khula’, does the husband have the right to change his mind?

Is it permissible for a man who has divorced his wife by khula’ to go back to her during the ‘iddah?

How much should a man take from his wife who is divorced by khula’?

Examples of acceptable reasons for asking one’s husband for khula’

A woman asking for divorce because of herhusband’s addiction