In Zurich, the maximum base fare is 8 CHF, while the maximum price per kilometer driven is 5 CHF [1]. UberX currently costs 1.80 CHF per kilometer [2]. It's not all that unrealistic to assume that this cost will go down to 56 Rp. when letting autonomous vehicles drive.
[1] https://www.stadt-zuerich.ch/content/dam/stzh/pd/Deutsch/Sta... [2] https://www.uber.com/de-CH/blog/zurich/preise-zurich/