You should be confident, willing to work hard and long hours if required, must be able to be on your toes constantly and must want to help and assist and be able to make yourself available 24/7 if needed.
Focus on the company and your individual experience
You write Accounting test first with little n=bit of Maths. If you pass, you come for face to face interview.
Just be yourself and focus.
You must have knowledge in cleaning.
Be prepared to work under pressure
And be shard worker.