I just did some testing this past week. I have converted all my old dorm tower to the new tower. I have 86 Dorms unlocked I had 47T T14 s converted to T10 I starred them all to 3 stars And i have still x36 T9s lvl3 remaining I have received 1.25Q refund I spent plenty to bump my tuts and everything else on swapping T10s and upgrading them to 3 🌟🌟 🌟 I need to swap 35x T9 s to T10 So I need 962.5T to exchange x35 T9s (just lvl 0) Then: + 133T to ug 35 T10s to 1st🌟 + 208.25T to T10 2nd 🌟🌟 + 297.5T to T10s 3rd 🌟🌟🌟 = 638.75.T Total: 962.5T+638.75 = 1Q.601.25 And this is not taking in consideration that I still need to swap T10 to T11 later. Nice Job. I regret this.