if you're a professional print designer.. you could charge anywhere between RM1000-RM3000+.

if your design is not like what you see in those professional ad magazines like Archive.. I suppose RM500-1000 is a good price.

brochure has the same terms as mentioned above, the better you are at them then the more you can charge. I'd try to calculate how many hours I'd take to complete the 15 pages and then give a rough figure. this only you'll know because you have the images and you know what needs done.