Measuring your contributions in terms of dollars IS tough. Someone at the company likely had a number for you somewhere, or at least your 'position' (since they like to think of you as being a superfluous factor, able to be switched out for any similar cog), but you won't ever see it. This is why sales people are usually the best paid people at any company next to the executives (and sometimes above them for non-public companies). When the company says 'we don't know if we can give you a raise this year' or similar, the sales person can say 'I brought you $15 million in business last year - you can afford to give me a raise that matches cost of living increases.' Hardly anyone else in a company can ever do that.