I disagree. Absolute profits would be the realistic option. The supplier is not adding to their profits due to the tariffs or whatever caused this, and the customer are surely as fuck also not getting more money.

She’s the only one in the chain that gets paid more when increasing her margin by percentages.

Of course there’s more to it than an example, and yes, someone else will be able to outbid her. The larger chains can easily do that while still maintaining their profits.