NCR Bill Book, Receipts & Invoice

Number of Colour(s) Example:
Royal Blue only = 1 colour
Green + Orange = 2 colours
Green + Red + Black = 3 Colours

Definition of 'PLY':
2ply = 1 top + 1 copy
3ply = 1 top + 2 copy
4ply = 1 top + 3 copy