User blog comment:TEmpestfEast/I DONT WANNA SPEND MONEY/@comment-24863025-20140802021419

"Personally, I feel that if anyone is to box summon, they should have at least $300 before trying. This is to make sure you get the UR. And at least $600 for the HUR. You don't wanna spend $200 and left 33 boxes to open to get the UR. You may not need the full amount to get the UR/HUR but best is to have the money set aside first before trying. If not, don't bother to try unless you want to waste money and do not get the limited card. If you try and fail, don't complain/whine. If you try and succeed, good for you."

My quote from Icarus .

In this case, 10k jewe; will leave you 66 boxes.

I did 4 box summon (Hole in One to Icarus) and none of them cost less than $400 to get the HUR. 10k jewel for 1 UR, yes, but have to be lucky.