We can do this by subtracting the total cost of the previous quantity from the total cost of the current quantity.
Quantity of boats: 0 1 2 3 4
Total Cost ($millions): 0 7 15 25 35
Marginal Cost ($millions): 7-0 = 7, 15-7 = 8, 25-15 = 10, 35-25 = 10
To
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