Answer:
The expenses incurred by Mrs. S would not be allowed for deductions.
Explanation:
amount
airfare(one ticket) $1,000
lodging $750
meals($100*3) $300
cutback adjustment ($150) $150
registration fee ($620 - $120) $500
car rental $300
total $2,700
Therefore, The expenses incurred by Mrs. S would not be allowed for deductions.