A plain look at what changed, and what it means from here.
Ask around and you will get a different answer every time, so here is the short version.
What it costs
The practical effect is easier to see in a single example than in a summary. The figures move about, but the direction has been the same for three years.
Where the confusion starts
The practical effect is easier to see in a single example than in a summary. Nobody is required to explain this to you, which is half the problem.
What actually changed
The practical effect is easier to see in a single example than in a summary. There is a deadline involved, and missing it costs more than the difference.
Whatever you decide, write down why. The reasoning is the part you forget.