tintin wroteDifficult question. May I suggest something I believe I heard from the Marx Bothers. Get a bundle of IDR 50.000 bills, and meet with the village chief. Eventually, when the conversation finally gets to the local temple and your contribution, start flipping the bills one by one on the table in front of you, while watching carefully the face of the village chief. When you detect a faint smile on his face, take back the last bill: you just got the right amount!
My goodness Tintin you must have psychic powers of some kind. How you can be so well informed after only a 30 year hiatus from Bali is absolutely amazing!