AX maintenance costing increases 25% on last year

Hi Everybody,

I just receive a maintenance pricing from my consultant that is a gold partner's microsoft.

And i'm so surprised when seeing on total value on our MS AX 2009 packing. It's increased 25% on value on last year (Nothing change on our system until now). I also search something to check it to know that it's not a mistake. But, i failed to find out any information to get it.

Thus, would you tell me some way to check "25% increasing" whether right or incorrect. I can't ask something from out consultant, or directly local microsoft office. And it's useful when tell me what about percent that microsoft decide increase on being used AX2009.

Thanks so much.

Alvis