Your answer really depends on your region and current market conditions. (Not enough info)
$26.00
Millikins, located in Grayling michigan will deliver (if nearby) 10 yards of screened topsoil for 169.00
You already have a square yard of topsoil, so how does 20 inches of depth get you the volume of topsoil? There are 36 inches in a yard, and you have 20 inches of topsoil depth that's 20/36ths of a yard of topsoil depth. That's 0.555... or about 0.56 yards. The volume of topsoil is 1 yard by 1 yard by 0.56 yards, or about 0.56 cubic yards of topsoil.
It depends on what it consists of. It could vary greatly.
Slightly less than 26 cu. yards.
Almost exactly 2.00 cubic yards for every inch of topsoil depth.
Topsoil is NEVER sold by the "truck-load". Usually in yards or tons, as there are several differant sizes of trucks... A "yard" of dry topsoil should weigh a little less than 1 ton.
A dump truck load of 7.5 yards
Insufficient information.You need to know the depth of topsoil you want to cover those 7550 sq ft.By "yards" I assume you mean cubic yards -- a volume measurement.
77/9 cubic yards for every inch of depth.
14.8 yards
15.833... [cubic] yards.
Approximately 10 yards; but it depends on the weight of the topsoil, whether it is moist or dry.