Javascript Conversion of Construction Cost Estimator

I have a Google Sheet that is used for cost estimation in construction. I need to convert it into a Javascript tool that can perform the same calculations and can also estimate costs for epoxy work progress, manpower and material costs. The tool should also include data visualization features such as charts and graphs.

Key Requirements:
- Proficient in Javascript
- Experience in data visualization and creating tools with visual output
- Understanding of construction cost estimation
- Ability to convert complex Google Sheets into Javascript

Please ensure your bid reflects your ability to deliver a tool that is not just functional, but also user-friendly and visually engaging.