Guys guys guys.... you are all thinking about this the wrong way. You need to find a supplier near you because these guys charge per mile or per "next town over" for delivery. Don't expect free delivery for such a "small order." Nobody retail in Monmouth County is going to deliver to Morris County.
You need delivery. Youre not going to pour 2 cubic yard of stone into your Nissan Rogue. Right???
You said 120 sf, but you didn't say how deep.
Assuming 6" deep then: 12'x10'x.5' = 60 cubit feet. Delaware river stone or goose egg stone (or any other bulk material for that matter) is sold in cubic yards which are 3'x 3' x3' or 27 cubic feet.
60/27 = 2.2 yards of Delaware river stone. Now realistically they just scoop it up with the 1CYD scooper on the front end loader and dump it in the dump truck. Also, know that you usually cant mix bulk material with palleted material, Its going to be a separate delivery or truck.