Problem: a rectangular floor that measures 24 meters by 64 meters is to be covered with carpet squares that each measure 8 meters by 8 meters . if the carpet squares cost $ 24 apiece , what is the total cost for the number of carpet squares needed to cover the floor ? 
Options: ['a ) $ 200', 'b ) $ 576', 'c ) $ 480', 'd ) $ 960', 'e ) $ 1,920']
b