$20 per retouched image. Your photo is nowhere near professional calibre. The lighting is dull, off colour and the resolution of the image is poor.
To salvage such mediocre photo's is going to take a tedious amount of fiddling for each photo, and still be innacurate without reference to the original item.
It might be more cost effective to get the photo's up to a better standard with out resorting to mediocre and tedious extensive retouching which is likely to create a big gap between what the customer sees on screen and what the customer recieves after they have purchased.
Don't be surprised if a lot of folk send your stuff back and chisel you for refunds, if you rely on retouching inconsistent mediocre photo's
Doing photography on the cheap is going to result in additional costs, slower turnaround, more refunds.
p.s. no mockups here, just too many timewasters about. If it is of interest, shots like this can be done for $10 a go, to professional standards, ready to use if organised on a batch basis. Regards, andy