Talk:Upgrade/@comment-87.221.177.54-20140610102152/@comment-112.208.253.179-20140701121809

Subtract the total needed exp of 29(8070) from the total needed of 50(37900),

37900 - 8070 = 29830

Now you only need 29830 which can be filled by 299 N Cards or 3 lvl 30 Slime Card