Proof reader required for already written articles (450 words) each

Hello, I have had a number of articles written for me approx 450 words each.

English was the article writers second language so there are a number of grammatical errors, for example "works" instead of "work", etc. I need them proofread with the word count either kept at 450 or increased as I will be
submitting the articles in ezines.

I have 10 articles to start with and more to follow.

Can you please specify how long each article will take you to do, to gauge an overall price?

Ps (2 samples attached).

Any questions, feel free to ask.

Thank you.