Web-Based Epoxy Flooring Quote Tool

I need a web developer to convert my Google Sheets epoxy flooring pricing sheet into an online quote calculator for flooring contractors.

Key Requirements:
- Web-based calculator hosted on a platform like WordPress or Squarespace
- Simple and clean user interface
- User authentication via email and password

Inputs:
- Floor type (flake, metallic, polished)
- Square footage
- Optional add-ons (e.g., crack repair, moisture barrier, custom color pattern)

Automatic calculations for labor and material costs based on inputs.

Ideal Skills and Experience:
- Proficiency in web development
- Experience with Google Sheets integration
- Familiarity with WordPress/Squarespace
- Strong UI/UX design for clean interfaces
- Knowledge of implementing secure email/password authentication

Looking forward to your proposals!