Beating a Yonko Commander is no small feat.He should at minimum get a bounty at the same range of King.
		
		
	 
 general  reasoning  would agree.. but like stated.. characters gets bounties  lower than the bounties  they win against.
like Buggy + Kreig + Arlong  = 52 mil
Luffy  gets 30mil
Daz bones = 75mil
Zoro gets 60 with the knowledge  of him whopping  100 pirate hunters in WP
Katakuri  + Cracker  = 1.8 bil +
Luffy  gets a 1 billion  increase  almost  half as much with the knowledge  of his altercation  with Bug mom
So if we take  Luffy  as an example  to argue  zoro off given luffy is the only  one who's bounty  has been  jumping after his 400 mil which he got in TS.
Zoro defeating a 1.3 bil character + side feats  like fighting  Kaido.. zoro's increase  would be twice  as much as he has which goes  in lock  step with  Luffy's pattern  that  he follows... Luffy  got  twice  as much as increase  from his initial  bounty of 500 mill which made it 1.5 bil
with that  same pattern Zoro should get around 600 - 700 to potential 800 - 900mil bounty  increase  compared  to Luffy's 1 billion  after WCI
for sanji it seems sanji will get  a bounty under  a bil for sure now that try to reason it out