Final answer:
Dagney's deductible expenses are a total of $4,800.
Step-by-step explanation:
To calculate Dagney's deductible expenses, we need to subtract the vacation costs from her total expenses. The vacation costs are not deductible. So, the deductible expenses are: Air fare ($3,000) + Lodging ($800) + Meals ($600) + Entertainment ($400) - Vacation costs ($0) = $4,800. Therefore, the correct choice is (e) None of these choices are correct.