Talk:Service Buildings/@comment-35524022-20190115193301/@comment-39045291-20190406100633

To be clearer you can upgrade every service building exactly 37 times:

5 upgrades of slots,

12 upgrades of coins,

12 upgrades of XPs,

8 upgrades of time.

You can perform the last upgrade when you reach the 38th level, and you will pay 37 supplies of any kind for this.