Last time I autocrossed for $25 I got four runs at maybe 60 seconds. At MidOhio I got three sessions each day for about 30 minutes each. $25/4 minutes= $6.25 per run.
3 sessions x 30 minutes x 2 days =180 minutes. $300/180 minutes = $1.67 per minute.
You learn so much more when you can put together lap after lap after lap after ......