Division 4 went from $165 (maybe it was $160?) to $200 a few years ago and re-tooled the purses to pay out to the 1/4s rather than starting with 3rd round.
These days with our current car counts, the 1/4s is generally the fourth round with exception of a few divisionals.
See payout at the link here:
https://www.nhradiv4.com/2014/PurseEntryFees.pdf
In addition to the posted payout, division 4 has sponsors for multiple classes that add $500 to the winners and $250 to the runner ups purses.
Thanks in particular to Sam Tech for Stock and Stanfield Racing Engines for the bonuses in D4.