Drywall sheets come in large sheets that usually run between 30 and 50 dollars. They charge so much per square foot. Normally at any home hardware store they can cut the sheet for your specified required sizes.
Drywall prices vary greatly from location to location and by type. You can find inexpensive panels for around $5 a sheet and upwards of $40 for better sheets.
It varies. I've seen a sheet go for 20 or maybe even 30 but if you're willing to do some shopping around, you'll find there are some really good deals out there.
