Holtz,
I completed a single SUNOCO through KISS in Sept. of 2022. As it was a first for me, I timed the visit and report. I was onsite for approx. 51 minutes, with the report running 1/2 hr. The fee was, according to my log, $28+$4+$1. As this was my first shop for the client, it naturally was, time wise, lengthier and there was an 11 minute hold-up while permission was sought for me to be on the property. As I was driving within a block of the station on non-shopping business, I did not have any travel time or expense.
Predicated upon the above, if I were regularly completing the shops I could trim, at a minimum, 1/2 hr. off the total of visit and report. If, also, there was either no or limited driving, $32 would be acceptable; the $1 was a waste. The shop proper was easy; the time problem was constantly referencing the paperwork.