Make sure your new numbers are at least plausible, unlike your old numbers.
Lets use your example of Ford. Ford had an EBITDA of around $16B last year. According to your numbers, the labor force only made about 10% of that, or $1.6B dollars. Assume that all value paid to the employees is in the form of cash (no benefits at all). Ford employs around 224,000 people. By your calculation, the average Ford employee made only $7142 last year. Does that sound even remotely possible to you? All those union production workers, engineers, designers, equipment techs, IT personnel, management, etc made on average $7142, with no benefits at all. You are off by at least a factor of 10, which means the employees keep at LEAST 50% of the value they produce, and often quite a bit more than that.