I need a photoshop designer

I need to add different cake photos to a certain background and make it look realistic as if it was really photographed on that background.

I attached a sample photo that shows a cake on the background.

I need to replace this cake with another one on the same background.

I also need to improve the quality of the photo.

I have around 60 cake photos to add on that same background.

So to sum up, I will need to improve the quality of 60 cake images and add those 60 cakes on that same background to finally receive 60 photos.

Please check my page @partybakez to notice how i upload the cake photos, I will need the photos look the same 1:1 ratio and also look realistic.

Thanks!