It is less complicated than it looks, once the terms are clear.
Most people meet this once and never think about it again, which is exactly why it is worth reading up on.
What actually changed
The figures move about, but the direction has been the same for three years. There is a deadline involved, and missing it costs more than the difference.
Where to go from here
The figures move about, but the direction has been the same for three years. Nobody is required to explain this to you, which is half the problem.
Whatever you decide, write down why. The reasoning is the part you forget.