In January, General Motors laid off 2,000 workers. Suppose you are hired as a consultant to estimate the impact of these layoffs on the number of cars that GM will be able to produce this year. To do so, you need to estimate the marginal productivity of workers at GM. You go to the company's web page and learn that the company pays the average worker $140,000 per year and is able to sell the average car for $20,000. If the labor market for automobile workers is perfectly competitive (firms take output and input prices as given), is this enough information to calculate the marginal productivity of workers at the company? If not, what is the most that you can say about the marginal productivity of workers at GM given this information?