For people interested in travelling to Sri Lanka and wonder how much it cost to travel in this country, here are some basic price examples for budget travel:

Double room (no single room exist usually):
800-1500 rupee per room (6-11 USD)

Food (lunch or dinner):
80-200 rupee per person (0,6-1,5 USD)

Mobile internet (SIM card + 1 GB data maximum 1 month use):
600 rupee (5 USD)

Bus/train (estimated):
40 rupee per hour (0,3 USD)

Remember that you can always bargain on the rooms, especially during the low season. The same goes for transport with taxi or tuk-tuk.