rodney your not reading that add right, Thats a veneer pack . meaning a bunch of small pieces. there are only a few places that sell veneer sheets.
Th early singers cabinets are one piece of veneer not pieced together, should you try piecing together a cabinet, you'll not be happy.
a top, you have 5 piece of veneer needed each one would be called a larger piece, the main section of the cabinet will use a 18 x 24 piece next the piece a machine sits in 16 x 22, the lid TWO pieces at 16 x 22
go look up that much in those dimensions cabinet grade.
people always think this replacing veneer is cheap.
Then hope to heaven you don't screw any of that up.