All prices below are in HK$ (US$1~HK$7.80)

Foodstuffs:

• can of Coke $4-5
• bottle of water $5
• Mars bar $6
• half-loaf of bread $9
• milk (1 litre) $20
• Big Mac Value Meal $17.90
• thickshake at McDonalds $9
• baked potato at Oliver's $24
• Dominos pizza $80-100

Other stuff:

• local phonecall free ($1 from payphone)
• international postage stamp $3.00
• South China Morning Post (newspaper) $7
• movie ticket $60
• CDs (top 40) $130
• DVDs $100-250 (although some movies can be found for $20)

Clothes:

• t-shirt $30
• cheap jeans $90
• casual trousers $140
• tailor-made vest $330
• Nike sneakers $500-900
• 3 tailor-made business shirts $1,000
• tailor-made shoes $500-1000
• tailor-made suit $1,500-2,500
  

You should keep in mind that eating in Hong Kong can be a costly exercise. Although you can get a decent snack (or a classic polystyrene "lunchbox")  for $25, a nice lunch in a reasonably-priced cafe can easily cost $75. Dinner (no wine) can range from $60-120. But if you want to eat somewhere really nice you can easily expect to pay $200-400 per person. And don't forget, most places will hit you for an additional 10-15% service charge. If you can’t ask a local for advice, don’t eat in a flashy restaurant (unless you want a flashy bill). Most places will have the menu out front for your perusal.