fees

I have been looking at the rules from all sides and I just need help from somebody.

I want to add an extra fee for when COD is chosen as payment option. With rules, how would i do that?

I don't see the action "Add line item". Where can I find documentation or a video that explains the underlying philosophy of this system of line items.

There has been a question raised in developing a Drupal Camp in Portland as to whether speakers should have to pay to attend the event and it has been discussed here: http://groups.drupal.org/node/167784

I have a Drupal 7.4 Website setup (winginitairventures.com) using Drupal Commerce 7.x1.x-beta4 and Commerce PayPal 7.x-1.x-dev.

Issue: On the orders page I need to add two fees:
* (General Admission Ticket QTY + Reserve Seating Ticket QTY) * 25 = Admin Fee Total.
* (Hotel Package A QTY + Hotel Package B QTY) * 20 = Hospitality Fee Total.

Attempted Solutions:
1) I've searched for a Fee Module, but I have not found one
2) I've searched for a Bundling Feature (might work), but I have not found one

Our steering committee is having a discussion about whether we should offer training for a small fee, or whether training should be free. We currently have presentations at each meeting which are free. The issue we have is that members are not mastering these presentations enough to do it on their own after the presentation is over. So we're thinking about having smaller, more focused, hands-on training sessions outside of the main monthly meeting.