Working as a teller in the bank

Q: I have a job interview working for a bank in the USA. I was told that it is haraam to work for an American or foreign bank because they deal with interest rates (RIBA). However when I work there I will be at the cashier, depositing the clients money in their account, not directly with riba. Please advice if this is haraam or halaal?

Khilaal of the toes

Q: Regarding khilaal of the toes, should one make khilaal of the toes of both feet together after washing both the feet or should one make khilal of the toes of the right foot after washing the right foot and of the left foot after washing the left foot? What is the sunnah method?