Need an online calculator for furniture reupholstery cost estimation

We run a small upholstery workshop and are tired of spending half an hour on the phone with every single caller just to give a rough price. Most people ask the same set of questions before they decide to book a measurement visit, so we would rather let them get a ballpark number themselves, right on the site, at any hour. We are looking for a freelancer who can build an online calculator for furniture reupholstery cost that our clients can fill in on their own and instantly see an estimated price range.

The logic has to reflect how we actually price jobs. A sofa costs differently from an armchair or a set of dining chairs, fabric grade changes the price per meter dramatically, and the amount of actual sewing and frame work varies a lot between a simple recover and a full rebuild with new filling. Rush orders should carry a visible surcharge so customers understand why a next-day job costs more than a two-week one. The calculator should feel like a short quiz rather than a boring form, and it must produce a clear result the client can screenshot or save, plus a way to send the request straight to us with contact details attached.

We already have a rough price table in a spreadsheet and can share it, along with photos of typical furniture types and fabric samples for reference. We just need someone to turn this into a working, mobile-friendly tool that plugs into our existing site without breaking the current design.

Requirements:
— Selectable furniture type: sofa, armchair, chair set, bed, other
— Fabric category selector affecting price per meter
— Sliders or steppers for volume of work (area, number of seats)
— Filling material choice: foam, springs, feathers, combined
— Urgency toggle with rush-order surcharge
— Instant price range display with a short breakdown
— Lead form to submit the estimate with contact info
— Mobile-responsive layout matching our existing site style