Corrector services required

Employer
[no-member:pro]Alla[/no-member:pro]
Project parameters
Type of cooperationOne-time project
SectionTexts and translation
Prepaymentwithout prepayment
Payment methodsBank transfer, Electronic money
Acceptance of requestsfrom Aug 20, 2018 until Sep 19, 2018
Project description
Requires proofreader services to edit text in the area of 30,000 characters. Correction for spelling and stylistic errors is required. The direction of the text is chemistry. Text in Russian.
Give me the cost and the timing.
Give me the cost and the timing.