How much pocket money should I bring to Indonesia?

This is just for buying souvenirs and stuff. I'm not familiar with the prices there and all, so could anyone help me? I just want to be able to buy some stuff there. If possible, could you give me the average price of:
1) Soda in a can
2) Bottled water
3) Keychains
4) T-shirts
5) Snacks such as chips
6) Other souvenirs which are famous in Indonesia
Thanks! :)

canned soda is about Rp.3500
mineral water (600ml) Rp.1500 (supermarket) - Rp. 3000 (on the street or tourist area).
keychains range from Rp. 1000 - Rp. 100.000 (depends on the material)
t-shirts starts from Rp. 15.000 - Rp 150.000 (depends on the quality and the place where you buy it)
chips are varied from Rp. 2500.

the rate 1 US$ = Rp. 9500 (approx)

if you are back-packing to indonesia for a week, 2 millions rupiah (approx. 100-200 US$) is very enough for buying souvenirs and REGULAR meals.
if you're going to eat in cafes, each visit can spend 50-100 thousand rupiah.

dont forget to bargain every time you want to buy things in the streets and stores. you should be spesific which town that you're going to visit when you're going to indonesia....

They shouldn't be expensive.
if possible could you add a realiable web site to book cheap flight+hotels to bali as im going their in december.thanks

Try following web site as well, it will be helpful

http://answers.yahoo.com/my/profile?show...

bring all your money man ehehe
soda, local about 60C, imported 1.10
Bottled water local about 30C, imported 1.40
Keychains is various
T-shirt good one around 10 to 15 bucks. Imported brand 40
Snacks local 30C imported around 1.20
souvenirs from 1 dolls to ...thousands
all in US$... but our currency is in Rupiah
1 us$ = 9400 Rp