According to the Developer's Diary and the Wiki for both last year and this year the cost to level to 8 is 1000 presents and both last year and this year's wiki shows it also costs 1000 grout (the developers diary being silent on how much grout is required). In game however the cost is 4500 grout and 4500 presents. Just what is the cost supposed to be? Not sure I would have bought it had not the information available indicated the cost as 1000 grout and 1000 presents.