It looks like the marketing costs in the mega menu doesn't update correctly, when you change them.
My impression is, that it doesn't remove the marketing cost of a specific model, even if you stop selling it - and end production of it.
If you need an example, you have the log and savegame in this post.
My impression is, that it doesn't remove the marketing cost of a specific model, even if you stop selling it - and end production of it.
If you need an example, you have the log and savegame in this post.