# Calculator & Quote Widget Kit — free sample

Three real files from the full kit (34 files), each **trimmed to taste** —
enough to judge the quality, not enough to launch with:

- `price-quote-sample.json` — the instant project-quote template from
  `templates/01-price-quote.json` with 4 of its 5 fields (base fee, hourly
  rate, hours slider, rush surcharge) and the same multi-statement formula
  style, mailto CTA and full EN/DE/TH labels. The full template adds a
  revision-rounds select whose fee lands on top of the subtotal — and it is
  one of **20 templates** that ship with the kit.
- `solar-savings-sample.json` — the solar-savings calculator from
  `templates/08-solar-savings.json` with 4 of its 5 inputs and the
  self-consumption math intact (production → own share → savings), plus the
  disclaimer and link CTA. The full version adds a feed-in tariff input that
  also pays the electricity you export back to the grid.
- `embed-playbook-excerpt.md` — the complete **formula-language chapter** of
  the embed playbook (all operators, all 11 functions, lazy `if()`, the
  field-type table) plus the full WordPress recipe and how the kit works.
  The full playbook adds the Ghost / Shopify / static-site recipes,
  localization, theming, the GDPR story and a troubleshooting table.

Why JSON templates? Because a calculator you can open in any text editor is
a calculator you own: change prices, labels, currency and units without
touching a line of JavaScript, and host them on your own domain with no
quota and no subscription.

What the full kit adds (31 more files):

- The embed engine: `calculator.js` — one vanilla-JS file, Shadow-DOM
  isolated, `Intl.NumberFormat` localization, formula evaluator, mailto /
  link / webhook CTAs, lead form with honeypot, themeable
- 18 more templates: shipping rates by weight band, mortgage, loan annuity,
  BMI, car rental, moving service, product configurator, ROI, compound
  savings, print cost, cleaning, catering, event venue, freelance day rate,
  renovation cost, quantity-tier pricing, HVAC sizing and more — each
  demonstrating one formula technique
- The full embed playbook (7 chapters) and the lead-capture webhook SOP
  (Zapier/Make/n8n, Google Sheets, your own endpoint, CORS + honeypot)
- `theme/theme.example.json` — every theme token, documented

One-time purchase $59 (≈ ฿2,040) · free updates for v1.x · 30-day full refund.