Lets see...

Announcer shows up at 3pm and goes home at 11pm = 8 hrs 150.00/8=$18.75/hr

Driver shows up at 6pm runs 5 hot laps, 2 qualifing laps, 10 lap heat and 25 lap main on 1/4 mi track (avg time working figuring 15sec/lap=10.5 minutes + push of line up laps,etc. we'll call it 15 minutes of work). If he gets $50 divide that by the time spent working it comes out to $200/hour.

Car owner gets his wallet out for a pit pass = 30sec, wrenches on the car a bit - hopefully not a lot - maybe works for 30 minutes total for the evening so if he gets $50 that is $100/hour.

Looks way better than the announcer dont even think about how underpaid the guy is that has to man the gate where the cars come on the track, he gets there at 4, gets pelted by dirt and mud all night, sometimes yelled at by drivers and car owners all for 20 or 30 bucks - that's about $4/hour...