I'll develop a calculator for apartment moving costs with loaders

I create cost calculators for apartment moves for websites of transport and cargo companies — those who move things from one apartment to another, not bulk cargo or commercial trucks. I calculate the calculator logic based on the client's task: the customer selects the number of rooms or indicates approximately how much stuff they have, marks the departure and destination floors, whether there's an elevator in each building, the distance between addresses, and whether furniture and fragile items need packing. The output is the total price, visible immediately on the page, without calling a manager.

Over years of working with such forms, I've collected a working tarification model: a base rate for volume or number of rooms, a surcharge for floors without an elevator (with a smooth increase per floor, not a fixed amount), a distance coefficient, and a separate charge for packing and loader work with fragile items. All this is configured in the client's admin panel — the numbers aren't hardcoded, they can be changed without my involvement. I make the form responsive, with validation at each step and clear guidance on what's included in the price.

What's included in the work:
— calculation logic matching the client's tariffs;
— adaptive form with step-by-step parameter selection;
— coefficient editing panel without code changes;
— calculator integration into website or landing page;
— testing on various scenarios and devices