The marginal revenue in the interval between six and seven jet skis is $300.
Marginal revenue is the revenue gained by producing an additional unit of a good or service.
Marginal revenue is calculated by subtracting the total revenue at a certain quantity from the total revenue when the quantity is one unit lower.
Marginal revenue = 2700 - 2400 = $300
The marginal revenue in the interval between six and seven jet skis is $300.
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