Alternative financial model support

[gregorbg]

The settings page only supports entering entrance fees for individual days and then calculates the price for multiple days by adding the values.
The payment system I'm using costs 7.50 euros for either single day but 10 euros for both days instead of 2*7.50 = 15. I'd like to have an option to enter such an alternative price model (which existed in the old admin panel, afaik?) so that the dashboard financial calculations are correct.

[fw42]

yep that's on my todo list (see #17)

will add this soon (going on vacation now though for a week)

[fw42]

closing this issue since the feature request is already mentioned in #17. thanks for reporting though, I wasn't sure if anyone uses this.