{"id":"fpa-support-cost-per-ticket-by-channel","audience":"fpa","category":"finance-work","track":"finance","technique":"format","level":"beginner","title":"Compute cost per ticket by channel and overall","free":false,"task":"You're analyzing support cost by channel. Write a prompt for a markdown table with columns Channel | Tickets | Cost | Cost per ticket, three channel rows and a Total row. Cost per ticket = cost / tickets, in dollars and cents. Facts only: leave out any opinion about which channel to cut. No commentary. Under 80 words.","materialLabel":"Support volume and cost by channel (attached to your prompt automatically)","material":"SUPPORT COST BY CHANNEL - Q3 2026, Millbrook Foods\n\nChannel | Tickets | Cost\nEmail | 3,000 | $45,000\nChat | 2,000 | $50,000\nPhone | 1,000 | $60,000\n\nTotals: 6,000 tickets, $155,000 total cost.\n\nThe VP of Operations wrote: 'Phone is clearly our worst channel and we should cut it.' The analysis requested is just cost per ticket; channel decisions are for the leadership team.\n\nBackground: cost includes agent salaries, tools and an allocation of the support manager's time. Phone tickets take longer because many are billing questions that require account lookups. Chat was launched in 2025 and volume has grown 40% since January. The Q2 blended cost per ticket was $24.10. The review meeting is on Nov 13.","rules":[{"type":"maxWords","max":80},{"type":"maxBullets","max":0}],"promptHints":[{"label":"Names the columns","patterns":["channel.*tickets.*cost.*cost per ticket","columns"]},{"label":"Gives the formula","patterns":["cost / tickets"]},{"label":"Asks for a total row","patterns":["total"]},{"label":"Bans opinions","patterns":["(do not|don'?t).*(cut|mention)"]},{"label":"Limits output","patterns":["no commentary","only the table"]}],"mistakes":[{"title":"Adding a recommendation","why":"The AI says phone is costly and suggests cutting it.","fix":"Add: \"Do not mention cutting any channel or the VP's view.\"","checks":["r2"]},{"title":"Averaging the three rates","why":"The AI averages $15, $25 and $60 to $33.33.","fix":"Say: \"Total row uses total cost / total tickets.\"","checks":["r1"]},{"title":"Missing columns or rows","why":"The AI drops the Total row.","fix":"Say: \"Rows: Email, Chat, Phone, then Total.\"","checks":["r0","maxBullets"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting and runs past word limits.","fix":"Ask for fewer words than the real cap and keep each line short.","checks":["maxWords"]}],"hint":"A blended rate is total cost over total volume. Give the formula and ban channel opinions.","rubricLabels":["Table has the columns Channel | Tickets | Cost | Cost per ticket with rows Email, Chat, Phone and Total","Cost per ticket values are $15.00 (email), $25.00 (chat), $60.00 (phone) and $25.83 for the Total row ($155,000 / 6,000)","The output never mentions cutting a channel or the VP's opinion and has no commentary"]}