Sighting the Moon for Eid

Q: We here in the Western Cape are split on the issue regarding the sighting of the moon for Eid. My wife and her family have Eid with Makkah and my family and I celebrate it with the local sighting of the moon.
My wife’s father is adamant that what I’m following is the wrong thing, I wish not to argue with him because the knowledge that I have regarding this issue is unfortunately very limited. Please enlighten me on this issue.

Zakaat on Gold

Q: I would like to know the correct method for paying Zakat on Gold. As far as I know we have to pay 2.5% of the total gold we own converted to the currency of the area you are living in.

Zakaat on Money Returned by a Supplier

Q: If I transferred monies 3 years ago to a supplier overseas, and until now, the supplier has not sent me the goods nor has he returned my money up until now, do I have to pay zakaat on this money. The money is sitting with him 3 years and he might return the money within a month? Do I have to pay zakaat on this money which is not in my possession for 3 years now?