Possible Clues:

• How prices are displayed by pub laws
• How price is displayed by pub laws
• Supermarket scanner's reading (2 words)
• Skin reportedly has lines and stripes in black and white
• Computer-read supermarket lines
• 'Howl!' — poem recited as a series of lines
• Lines in stores
• Stock control pattern
• Register reading
• Reportedly shout verse that's scanned