In my original example, the profit on wool could be $0 (0% of revenue) or $1000 (100% of revenue), depending on how you allocate costs. So, if there's a true nu

In my original example, the profit on wool could be $0 (0% of revenue) or $1000 (100% of revenue), depending on how you allocate costs. So, if there's a true number, it's somewhere in the range 0% to 100%.