Is a 3% Seller Subsidy to Buyer and 3% Seller Payment towards Buyer’s Brokerage Compensation normal?

So if I'm selling a property for say $300k, and the offer comes in asking for 3% subsidy to the buyer, as well as 3% compensation for buyer's brokerage, that's 6% being reduced from the net, so I'd be only getting $282k, correct?

3% seems kinda high, no? Isn't the typical compensation for the buyer's brokerage around 2%? And the subsidy also seems high, no? Or are those typical numbers??