Lessee here...A human room is 100 coins, plus 50 coins per Yoshi in the room so...
100 + 50 = 150 + 50 = 200. O.K. *sets a bag with 200 coins on the counter* One 1 human 2 yoshi room, please. *gets key* I'll wait 'till repairs are done so I'll reserve it!^_^