Local laws make it illegal to carry out business in a foreign currency. Changing money is relatively easy.
Business hours are from 09.00 to 17.00 on Mondays to Fridays and on Saturday mornings. Some supermarkets are beginning to open on Sundays as well. If you are feeling hungry at night, then bakers' shops open late to sell fresh-baked bread.
Samoa is relatively inexpensive for western visitors. Haggling is not customary and is in fact considered to be rude. Tipping is not practiced or expected in Samoa.