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Report cost per lead by channel and the blended figure for the CFO

  • For Executives
  • You practice Catching mistakes and made-up facts
  • Time about 5 minutes
  • Level Advanced

About this exercise

Your CFO, Rahul, wants cost per lead (CPL) by channel for Q3. Write a prompt for a markdown table with columns Channel | Spend | Leads | CPL | Flag, where Flag says "Over $55" for any channel above the target of $55 and is blank otherwise. Then one line starting "Blended CPL:" showing total spend divided by total leads. Do not average the channel CPLs. Under 90 words, no other text.

Common mistakes when you ask AI for this

  • Averaging the CPLs. The AI averages four CPLs and reports $62.50. Try: Say: "Blended CPL = total spend / total leads; don't average the CPLs."
  • Flagging the wrong channels. The AI flags by feel, or flags those at or under target. Try: Say: "Flag only channels above $55."
  • Commentary on meetings. The AI adds a note about conversion to meetings. Try: Say: "No other text."
  • Letting markdown through. AI adds bold text and headings by default. Try: Add: "Plain text only, no bold, no headings."

What a strong prompt includes

  • Names the table columns
  • Defines CPL and the flag
  • Defines blended CPL
  • Bans averaging CPLs
  • Asks for no other text

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