How To Hang Shelves On Cinderblock

Use a tape measure, a pencil, and a level layout (mark the drill holes) for the concrete screws.
Place a 4’ level from hole to hole to make sure you're close to being level.
Using the hammer drill and bit pre-drill all of your bracket holes.
Once the bracket holes are drilled put the Tapcon through the bracket and sink anchors with a cordless drill.
Continue the above steps until all of your brackets are attached.
Place the painted shelves on the brackets and use the screws that came with the brackets to attach the shelves to the brackets from the underside.

It is best to anchor into and drill into the grout lines above and below the actual CMU blocks
The CMU grout line itself should be pretty level…(just check and don't assume).

Cost: under $60