Answer:
The correct answer to this question is A) with the addition of 11th worker , the marginal profit ( for 11th worker ) of Rosie's flower shop would be $500.
Explanation:
Marginal profit can be defined as the additional amount of profit that a company earns because of an additional unit that had been produced.
Here we can calculate what marginal profit would be for the 11th worker as-
Workers Selling price Cost price Profit
10 $7500 (500 x $15) $4000 (10 x $400) $3500
11 $8400 (560 x $15) $4400 (11 x $400) $4000
So from the given above information we can say that if we take out the marginal profit for 11th worker it would be $500 ( $4000 - $3500 ).