Answer: $4,000
Explanation: Economic profit can be defined as the difference between the total revenues generated from operations and cost incurred plus any opportunity cost taken.
Opportunity cost is the cost of next best alternative foregone, that is loss of profits that occurred due to choosing one alternative over other. In the given case loss of interest and loss of highest salary are opportunity cost for Jacqui .
Hence,
economic profit = revenues - (interest + salary)
= $50,000 - ($1000 + $45,000)
= $4,000