There is no fixed charges. A good start is RM800, 5 shot per item.

Very subjective..depends on the photographer or the agency involved.

There is no standard pricing, it can be higher or lower. Some people may find it very cheap some say expensive..

You have to consider how many shots taken..say 10 shot per subject, if 10 subject ..thats 100 shots. You give 5 best image per subject...that's a total 50 images for 10 subject. For min RM800..thats min RM16 per best image. If you give only 1 image, thats RM80 per image as mentioned by Goldfries.

So its up to you..some of your gear are expensive and your experience does count too.