Calculator for remote interpreter pricing needed

Our translation bureau handles a growing number of requests for interpreters on video calls — client meetings, negotiations, webinars and online conferences. Right now every quote is calculated manually by a manager, which takes time and often gives clients slightly different numbers depending on who answers. We want to fix this with an interactive calculator embedded directly on our website.

The tool should let a visitor pick a source and target language from a reasonable list of the pairs we actually work with, specify how long the video call will last, and enter the number of participants who will need interpretation. Based on these three inputs the calculator should instantly show an estimated total price, ideally with a short breakdown of how it was reached. Rare or complex language pairs should carry a different rate than common ones, and a longer call or more participants should scale the price by rules we can configure ourselves, without asking a developer every time rates change.

We are open to a simple embeddable widget or a small standalone page, whatever fits our site better technically. What matters most is a clean, mobile-friendly interface, correct rounding of the final sum, and an admin-editable pricing table so numbers are not hardcoded.

Deliverables:
— working calculator (language pair, call duration, participants) with instant price output
— editable rate table by language pair and by duration/participant tier
— responsive layout matching a typical corporate site
— brief instructions on how to update pricing later