I need background color correction and touch up's on 15 product photos

I need the entire background of 15 product photos 'whited out' - the entire background should be white and the only thing you can see are the wooden stools. The job must be perfect, not sloppy...

I would also like for you to 'sharpen' the photos if possible - increase the resolution so you can see more crisp detail in the wood of the stools. If you are unable to sharpen/increase resolution that's ok, the white out of the backgrounds is most important.

Attached are 3 sample photos, it wont let me upload any more than 3... But they are all about the same.

Please let me know what you will charge me for this job. Thank you!