How big of a box? They are normally sold by weight.
20
This is a joke right? Answer is - they're cheap!
If you drywall on 16" on-centre studs, with sheet length perpendicular to the studs, and screw the two outside length edges at 6" spacing (as it should be) and the two interior studs at 12" spacing, the answer is 48 drywall screws per 4'x8' sheet.
About 453,592mg per pound.
0.454kg per pound.
453.592g per pound.
$6.00 per sheet
453,592 milligrams per pound.
There are about 453.6 grams per pound.
10 tacos per pound of chicken.
16 ounces per pound.
454 ml of water in a pound