How does pricing work in my catalogue?

Services are priced monthly, yearly prepaid, or as a one-off. Prices are versioned, never edited: a new price is a new version starting from a day you name, and everyone already coaching keeps the price they agreed to. Retiring a service stops new offers and changes nothing already sold. Names and descriptions can be translated into the other six languages. Amending someone's package always runs off a preview the system worked out, pinned to the day it was computed, so a confirmation that has gone stale is refused rather than applied to numbers that have moved.