Historical clue formulations

• Plug amount — 2026-04-11
• Typical marketing expense — 2026-03-01
• Charge for airing a commercial — 2026-02-16
• Cost for a commercial — 2025-01-13
• Something a P.S.A. lacks — 2023-05-21
• Cost for a spot — 2022-01-23
• Cost for a radio or TV commercial — 2020-02-10
• Charge for a plug? — 2017-05-16
• Charge for a plug — 2014-10-05
• Charge to appear in a magazine — 2013-03-13
• Magazine revenue source — 2012-03-28
• Cost of time or space — 2007-05-13