Photo editing - change material/colour of furniture

We have a number of products for which the photography was done but we now wish the images to reflect different finishes or colours.

There are around 30 images in total, the work is ongoing.

Please see the attached example and quote per image since the work will continue after this project.

The example attached would be changed to white matt paint finish, still with wood grain surface.

Work to be carried out immediately, to provide psd files.