If after knowing it you still don't want to lend me the remaining of the money, then I'll raise it somewhere else and I'll pay you your 15 euros whenever I can. As I said, right now I am broke and I don't have 15 euros ─ if I had it I would have already registered the domain ─ so keep that in mind. You'll have to take that risk!
I have a good suggestion to you. Just do not take food few days and in this way you will be able to save 15 euro easily.