Construction Estimating Spreadsheet Development

I need a detailed estimating spreadsheet for construction projects, primarily focused on cost calculation. The spreadsheet will be used to calculate material and labor costs.

Key Requirements:
- Accurate cost input for materials and labor
- User-friendly interface
- Ability to handle multiple projects
- Summary of total costs

Ideal Skills and Experience:
- Proficiency in Excel or similar spreadsheet software
- Experience in construction cost estimation
- Attention to detail and accuracy

Please include relevant experience in your application.