Compute AP on-time rate, average days to pay and discounts taken

About this exercise

You're reporting October AP performance to the controller. Write a prompt for plain text with lines starting "On-time rate:", "Average days to pay:", "Discounts taken:" and "Note:". Count invoices only, not the credit memo application. Show the math on the first three lines. The Note line names one thing to confirm with AP, as a question, with no blame. Under 90 words.

Common mistakes when you ask AI for this

• Counting the credit memo. The AI divides by 9. Try: Say: "Count invoices only, not the credit memo."
• Missing the sum. The AI states 32 days with no working. Try: Add: "Show the sum of days divided by 8."
• Blaming AP. The AI says the team missed discounts through carelessness. Try: Add: "Note: one question to confirm, no blame."
• 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 part short.

What a strong prompt includes

• Names the four lines
• Excludes the credit memo
• Asks for the math
• Frames the note as a question
• Caps length

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