I purchased all of the materials at Lowes and the total cost was around $30.
2 of Item #107805--72" Brass Pilaster Strip
2 of Item #107800--Real Organizer Shelf Clips
2 of Item #334139--8x36 Oak Flat Edge Shelf
1 of Item #41310--7'L Prefinished Amber Apron Moulding
1 of Item #1220--1/4x2x4 Poplar
The back of the cabinet wall was not as solid as I liked so I used the Poplar behind the strips on that wall to give them more stability. When cutting the strips to length make sure that the holes match on each cut strip otherwise the shelves will not be level. I cut the 8x36" Oak Flat Edge Shelf to the desired length and notched each corner to fit. Although you probably could get by without it I attached strips of the Apron Molding on the open end of the shelf to keep things from falling off.
I screwed the pilaster strips to the inside of the cabinet on the side where the hinges are (about 3/4 to 1" from the wall) and on the inside of the strip in the middle where the doors close (about centered).
Photo of strips on front wall
Photo of shelf in place
Shelf showing cutouts