Answer:
$790
Step-by-step explanation:
Charlotte attended a 3 day business conference.
She stayed 2 additional days after the conference.
Her airfare was $400
Lodging was $110 per night
Incidentals were $20 a day.
Charlotte's business expense includes thus,
Lodgings for 3 days which is $110 * 3 =$330
Incidentals for 3 days which is $20 * 3= $60
Airfare=$400
Total cost as a business expense= $330 + $60 + $400= $790.