Excel Pricing Calculator Webpage

I have an Excel file that acts as a product pricing calculator and I need it rebuilt as a self-contained webpage. Every formula, lookup and conditional rule that currently lives in the sheet must work the same way online, delivering an instant price as the user changes the inputs.

Here’s what I’m after:

• A clean, responsive HTML/CSS/JavaScript page (vanilla JS or a lightweight framework is fine) that mirrors the Excel logic for product pricing.
• The layout should feel as simple as a spreadsheet: input fields on one side, an at-a-glance results area on the other.
• All calculations have to run client-side so the page loads quickly and works offline if the browser cache is available.
• I’ll hand you the original workbook; you convert every formula and return the page along with brief comments or inline docs so I can tweak numbers later if needed.

Acceptance criteria
• Entering the same sample data in both the Excel file and the webpage produces identical results to the cent.
• The page renders correctly on current versions of Chrome, Firefox, Edge and mobile Safari.
• Final deliverable is a zip (HTML, CSS, JS) plus a short read-me explaining the file structure and where the formulas live.