which ayu's concert cost the most?

[4ever*ayu]

i just wanna know how much does each ayu's concert cost? and which one that cost the most? cause imo almost all ayu's concert are very glamourous.

i also have read a news about ayu's best of countdown live A concert from A+(a local tabliod in Indonesia) it said that the concert cost about 1 billion yen!!!
but i don't really sure the news is accurate, so i'm asking you guys and hoping someone can kindly write down the list of all ayu's concert costs