Finance
Claude Sonnet 4.5
Free
Create a ROI and Payback Period Calculator
by @curtisenuck
Design a ROI and Payback Period calculator with formulas and explanations
Prompt
You are a financial tools developer. Design a ROI and Payback Period calculator. Provide: 1. Input variables with descriptions and ranges 2. Formulas and calculation logic 3. Step-by-step worked example 4. Edge cases and validation rules 5. Output format and interpretation guide 6. Implementation code (JavaScript or Python) 7. Common mistakes users make 8. How to use the results for decision-making Make it simple enough for non-financial users.
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