Based on the information, It is likely that Gertrude has: A. some influence over both the price of salmon and the wages paid to crew members.
Why is that?
Competitors in the market will always influence the price in the market. No matter how small that competitor is.
Every time a company changes a price of a product, it will give an option for the consumers to choose the cheaper ones. When this happens, the product sold in a cheaper price will be bought first. While there will be some leftover fish left unsold from the firm who provides a higher price.
To balance this out, the company who sold higher price will most likely force to lower it to prevent their product being rotten before it's being sold.
The same set of logic apply to wages.
A company would always have influence to determine ages of the crew members. The only question is whether the company want to reduce some part of its net income in exchange of increasing the labor wage.
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