{"id":"cx-seat-removal-prorated-credit-lines","audience":"customer-support","category":"support-work","technique":"verification","track":"support","level":"intermediate","title":"Compute a prorated credit for removing seats mid-cycle","free":false,"task":"Start with the line \"SEAT CREDIT - Blue Fern\". Then write three lines starting \"Per seat:\", \"Credit:\" and \"Applied to:\" showing the arithmetic. The credit is account credit on the next invoice, not a refund to the card. Plain text, under 50 words.","materialLabel":"Your material (attached to your prompt automatically)","material":"BILLING FACTS - Blue Fern Studio\n- Plan: $12 per seat per month, 10 seats, billing cycle of 30 days.\n- On day 12 of the cycle the customer removed 3 seats. 18 days of the cycle remain.\n- Policy: removing seats mid-cycle gives a credit for the unused days: price per seat x days remaining / 30.\n- The credit is applied to the next invoice as account credit. It is never refunded to the card.\n- Seats removed before day 1 of a cycle are not charged at all (not relevant here).\n\nNOTE: The customer wrote 'I assume I get $36 back for the three seats' (3 x $12). That ignores the days already used.","rules":[{"type":"plainText"},{"type":"maxWords","max":50}],"mistakes":[{"title":"Giving the full month","why":"The AI credits $36.","fix":"Say: \"Prorate by the 18 remaining days of 30.\"","checks":["r1","r2"]},{"title":"Refunding to the card","why":"The AI says the credit goes back to the card.","fix":"Say: \"Account credit on the next invoice only.\"","checks":["r2"]},{"title":"Missing the title","why":"The AI starts with the math.","fix":"Quote the title.","checks":["r0"]},{"title":"Getting markdown back","why":"AI adds bold and headings by default, which show up as stray symbols where this is pasted.","fix":"Say \"plain text, no bold, no headings, no asterisks\".","checks":["plainText"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting and usually runs long, so a vague \"keep it short\" lands well over the limit.","fix":"Cap each part instead of the total, for example \"each line under 15 words\".","checks":["maxWords"]}],"promptHints":[{"label":"Quotes the title","patterns":["seat credit - blue fern"]},{"label":"Names the three lines","patterns":["per seat:","credit:","applied to:"]},{"label":"Asks to show the arithmetic","patterns":["show the (math|arithmetic)","18/30","x"]},{"label":"Asks for plain text","patterns":["plain","no bold","no markdown","no formatting","no headings"]},{"label":"Sets a length limit","patterns":["\\d+\\s*words","word (limit|count)","under \\d+"]}],"hint":"Quote the title, name the lines and ask for the arithmetic with the proration.","rubricLabels":["The first line is exactly \"SEAT CREDIT - Blue Fern\"","The line starting \"Per seat:\" shows $12 x 18/30 = $7.20 and the line starting \"Credit:\" shows 3 x $7.20 = $21.60","The line starting \"Applied to:\" says the next invoice as account credit, not refunded to the card, and the output does not give $36"]}