No, you're supposed to guess how much to bribe. They make more that way. And then after you've bribed one person, keep the ink wet because you'll need to bribe someone else soon!

Everyone knows how much the bribe is: Collusion! Cartels! Calamity!

No one knows how much the bribe is? "Relationships are Important", "Cost of Doing Business", "An Investment in Us"

evidence suggests, however, its still laughably cheap to buy so dont expect more than 1% of annual revenue.