Larry and Susan each invest $10,000 in separate investment activities. They each incur deductible expenses of $800

Question:

Larry and Susan each invest $10,000 in separate investment activities. They each incur deductible expenses of $800 associated with their respective investments. Explain why Larry's expenses might be properly classified as deductions from AGI (itemized deductions) and Susan's expenses might be appropriately classified as deductions for AGI?