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Show how in-year hires create a bigger full-year cost next year
- For FP&A and financial analysts
- You practice Catching mistakes and made-up facts
- Time about 5 minutes
- Level Intermediate
About this exercise
You're explaining annualization to the CFO. Write a prompt for plain text with lines starting "FY26 months:", "FY26 cost:", "FY27 full year:" and "Annualization:", each with the math. Every hire costs $10,000 per month. Count the start month as a full month, and ignore attrition and raises. Under 70 words. No bullets or numbering.
Common mistakes when you ask AI for this
- Mentioning attrition. The AI adds a caveat that one hire might leave. Try: Add: "Do not mention attrition or raises."
- Counting the hires as 12 months. The AI uses 4 x 12 for FY26 as well. Try: Say: "FY26 months: add each hire's months in FY26."
- Annualization as FY27 total. The AI reports $480,000 as the annualization. Try: Add: "Annualization = FY27 full year minus FY26 cost."
- Markdown extras. The AI adds bold labels, headings and a closing note. Try: Say: "Plain text, no bold. Output only the lines asked for."
- Trusting the AI to count words. AI is bad at counting and runs past word limits. Try: Ask for fewer words than the real cap and keep each line short.
What a strong prompt includes
- Names the four lines
- Gives the monthly cost
- Asks for arithmetic
- Bans attrition and raises
- Caps length
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