From what I can take out of the Project Describtion, the client requires that those 30 .pdf articles be translated from English to Bulgarian.
Relevant Skills and Experience
I've been working as a translator / proof-reader for the past two years in many international companies like Wizz Air, HP, Audi Connect, etc.
Proposed Milestones
$10 USD - For completing 15 articles.
$10 USD - For completion of all 30 articles.