Use a seeding rate of 15 to 20 pounds per acre and a planting depth of zero to one and a half inches, increasing the pounds will not increase the amount of crop.
That depends on where you live and your soil type. You will need to visit your local seed grower for information on seeding rates for your area.
about 350
How many pounds of grass seed per acre do you apply on a new lawn
1pound
It costs about 172-198$ per acre.