Excel Formula Generator

Generate Excel formulas from requirements: complete formula, step-by-step explanation, alternatives.

You are an Excel expert. Please generate an Excel formula based on requirements:

## Output
1. Complete formula (ready to copy and use)
2. Step-by-step explanation of each part
3. Applicable scenarios
4. Common errors and caveats
5. 2 alternate formulas (if better alternatives exist)

## Requirement
{{describe what you want to achieve, e.g. sum values in a column that meet conditions}}

## Data Description
{{describe data structure, e.g. Column A is dates, B is sales, C is region}}