Well I know that the generic, debris-filled cheap $1.50 topsoil bag at
Home Depot is 40 pounds. The "Scotts: Premium" topsoil is $1.98 and
comes in a 30 pound bag. All the bags of "Organic" topsoil run anywhere
from $5 dollars to $7 dollars a bag at my local garden center, and they
all come in 40 pound bags as well.