What is the group visa fee for 2 working day proceesing, please?

I am Jayantha, planning to visit China and Tibet in a group of 11 in September on Group L. I am awating for the invitation letter from the Chinese agent and I was informed that as they are preparing for the Shareton Festival, it will send between 20-25th of August. As our route is via Nepal, we want to get it as soon as possible. Therefore, please let me know the group L for 3 days processing.