Lol :)
I`m twenty something. I share the flat. I pay 225lv for the rent and 50 more for bills (not including my tiiiiny phone bill).
I`d like to add some more corrections. If u r below 26 and do not work and u r a student, u don`t pay for health insurances. And if u r a student in Sofia ur transport costs are just 21lv if u don`t travel after midnight or by a taxi.
If I were in ur shoes, I`d move ur Medical and insurance 	10% and Auto–transportation 	15% to the housing 33%.

And I wish u luck with the challenge :-D