What is the ruling on working at a petrol station at the till and serving the odd ham sandwich or chocolates etc. which contain haram ingredients? How do I purify my earnings of this small percentage of haram (like ham sandwiches etc.) sales. There is no alcohol in the station Alhamdulillah.
Jazakallah, I anticipate your reply. May Allah reward you!
Give as much Sadaqah as possible. Since most of your income is halal, therefore your earnings are halal for you.