Need a cost calculator widget for custom cake orders

We run a small private bakery and take custom orders for birthday and wedding cakes, and right now every price quote is worked out by hand: a client describes what they want in a chat, we open a spreadsheet, estimate the price by weight and composition, and reply later. This is slow and often has to be redone from scratch when the client tweaks a detail mid-conversation. We want an interactive calculator widget on the website that takes this routine off our hands and shows the visitor an estimated price and production time right away.

The widget should let the customer pick the total weight, the number of tiers, the type of cream (butter cream, cheese cream, whipped cream, ganache) and the filling (berry, fruit, chocolate, caramel, nut), plus a decoration complexity level from a simple finish to fully custom sculpted decor. Every option should affect both the final price and the lead time, based on a coefficient table we will supply. The result block should separate the base price, the decoration add-on, and any rush-order surcharge.

We would like it lightweight, mobile-friendly, and editable by us later through a simple config rather than hardcoded values.

— Weight and tier selection
— Cream and filling options
— Decoration complexity levels
— Live price and lead-time recalculation
— Editable pricing table
— Optional order request form