How to add a set up fee for membership in Membership 2?

Hello,

I have Membership 2 installed and I can't see a way to add a set up fee when a member signs up. Is there a way to do this?

I want members to sign up for a membership level that will charge a monthly recurring payment as well as a one time set up fee. It seems like a feature that should be built in I'm not sure.
Thanks in advance,
Monique