Australian (With indefinate leave visa) applying from UK to go to China

Hello,
I am an Australian Citizen who lives in the UK looking to go to China early April.
I have a copy of my flight details
Letter from friend who I will be staying with (with a copy of her passport)
My current passport
An old passport with my indefinitely leave entry permit
A completed form as per this website
Return self-addressed envelope
A checklist with all the things I am including in the envelope
I just do not want to delay my application so have a few questions.
1. Estimated time I will have my entry permit and passports back via post
2. IS there anything else I need to send?
3. Can you confirm the total cost for you to do the single entry type
Thank you!
Danielle