# Quote calculator conventions

- Money is integer cents. Do not convert to decimal dollars.
- Export `quoteTotal(items)` from an ES module.
- Each item has `unitPriceCents` and `quantity`, both nonnegative safe integers.
- Return `{ totalCents, currency: "USD" }`, including for an empty list.
- Reject invalid inputs or an unsafe total with `RangeError`.
- Do not add dependencies.