Photoshop Person Into Group

I have a sunny outdoor group photo that’s almost perfect—except one friend was behind the camera instead of in the shot. I’ll send you the original JPEG along with a clear head-and-shoulders image of the missing person... (Budget: £10 - £20 GBP, Jobs: Adobe Photoshop, Digital Art, Graphic Design, Image Analysis, Image Processing, Image Recognition, Photo Editing, Photo Retouching, Photoshop, Photoshop Design)