{"id":"mkt2-blended-cpl-table-for-cfo","audience":"executives","category":"data","track":"marketing","technique":"verification","level":"advanced","title":"Report cost per lead by channel and the blended figure for the CFO","free":false,"task":"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.","materialLabel":"Q3 lead report (attached to your prompt automatically)","material":"Q3 MARKETING - leads and spend by channel\n\nChannel | Spend | Leads\nSearch ads | $12,000 | 200\nSocial ads | $6,000 | 150\nEvents | $9,000 | 90\nEmail | $3,000 | 60\n\nTarget CPL: $55.\nCPL = spend / leads.\n\nNotes:\n- Events leads usually convert to meetings at a higher rate than the others, but meeting data is not in this report.\n- A board member said \"our average CPL is about $62\". That figure came from averaging the four CPLs.\n- Spend excludes salaries and agency fees.","rules":[{"type":"plainText"},{"type":"maxWords","max":90}],"mistakes":[{"title":"Averaging the CPLs","why":"The AI averages four CPLs and reports $62.50.","fix":"Say: \"Blended CPL = total spend / total leads; don't average the CPLs.\"","checks":["r2"]},{"title":"Flagging the wrong channels","why":"The AI flags by feel, or flags those at or under target.","fix":"Say: \"Flag only channels above $55.\"","checks":["r1"]},{"title":"Commentary on meetings","why":"The AI adds a note about conversion to meetings.","fix":"Say: \"No other text.\"","checks":["r0","maxWords"]},{"title":"Letting markdown through","why":"AI adds bold text and headings by default.","fix":"Add: \"Plain text only, no bold, no headings.\"","checks":["plainText"]}],"promptHints":[{"label":"Names the table columns","patterns":["channel.*spend.*leads.*cpl.*flag"]},{"label":"Defines CPL and the flag","patterns":["over \\$55","\\$55","above"]},{"label":"Defines blended CPL","patterns":["total spend","divided by total","blended"]},{"label":"Bans averaging CPLs","patterns":["don'?t average","not .*average","do not average"]},{"label":"Asks for no other text","patterns":["no other text","no commentary","only the table"]}],"hint":"Blended CPL is total spend over total leads, not an average of averages. State the formulas, the flag rule and the ban on extra commentary.","mission":"Show CFO Rahul Q3 cost per lead by channel.","musts":["Flag channels over $55","Blended is total over total","Don't average CPLs"],"rubricLabels":["The table has the columns Channel | Spend | Leads | CPL | Flag with CPLs of $60 (search), $40 (social), $100 (events) and $50 (email)","Flag says Over $55 for search and events only, and is blank for social and email","The Blended CPL line shows $30,000 / 500 = $60 and does not use the $62 average, and the output has no other commentary"]}