Talk:Service Buildings/@comment-35524022-20190115193301/@comment-24384762-20190116054426

You can have 6 slots for each service building. (1 initial slot plus 5 upgrades)

You can upgrade the Coins to 60%. (12 upgrades total)

You can upgrade the XPs to 60%. (12 upgrades total)

You can upgrade the Time to 40% (of the base time in 5% increments). (8 upgrades total)

That's a total of 6+12+12+8=37 upgrades for each of the 7 Service Buldings.