Final answer:
Melissa can deduct $869.50 as business expenses.
Step-by-step explanation:
When determining which costs Melissa can deduct as business expenses, we need to consider that expenses must be ordinary, necessary, and directly related to her business. Based on the given information, Melissa can deduct the following costs:
- Registration fee: Melissa can deduct the entire $405 registration fee as a business expense.
- Parking: Melissa can deduct the $152 parking fee as a business expense.
- Meals: Melissa can deduct 50% of the $625 spent on breakfast and dinner, which amounts to $312.50.
Therefore, Melissa can deduct a total of $869.50 as business expenses.