Proof reading

Hi, The subject of the essay is medical related .I have nearly 4300 on the main topic,You need to bring it down to 3800 words. The second part also need editing but keep the word count as it is.You are required to proof read it for grammar and structural mistakes.Free to rewrite the sentences without loosing the context and meaning. Please reply with possible terms and conditions and time limit. Please go through the attachment. Thanks