How much would it cost to visit Guilin, Yangshuo and Xi'an?

Please leave the prices in USD.
My options and how much would each one cost?
1. Guilin, Yangshuo and Xi'an
2. Guilin and Yangshuo only.
3. Xi'an only
4. Beijing. Sorry but I had to include this destination also :)

-Accommodation: one room, one bed and in a 3, 4 or 4 stars hotel (with WiFi) including all the daily meals
-Transportation included in these cities preferably.

Thank you very much for your time.