Related Clues:

• 5 for B or 6 for C, e.g.
• Words with ''cost to you'' or ''time''
• -- cost (gratis)
• 13 for Al, e.g.
• 79, for gold: Abbr.
• -- time (never)
• Elemental ID
• It's 8 for O
• -- time (not once)
• ''___ extra cost''
• ___ extra charge
• -- time (not even once)
• 80, for Hg
• ''___ added expense''
• 7 for N, e.g.