Concrete by itself was quoted around $5,500 for:
30x50 5 inch slab, plus perimeter footers (2' deep x 1' wide)
50x9' exterior apron on the side of the building (4" deep)
4' x 30' 4" exterior slab on front of building
Wow! I got quoted 3x that for a 18x26 4'' garage slab if I did the demo and prep work!