COMMERCE-2511 and the related stories for context and full requirements.
- On a price list or promotion's configuration, an admin can configure whether the prices are defined as gross or net prices.
- On a channel's configuration, an admin can configure whether the channel shows prices with the tax included or tax excluded.
We need to explore the following ideas to see if it is feasible to support some advanced configuration without sacrificing too much ease of use. See the open questions on the following tickets