Can we establish a convention? If you sold $500p/m and had costs of zero, then you made $500. If you sold $500p/m and had costs of $450 p/m then you made $50

Can we establish a convention? If you sold $500p/m and had costs of zero, then you made $500. If you sold $500p/m and had costs of $450 p/m then you made $50p/m I know the saas people have high margins, but some of the commenters clearly have a much lower margin