Please Help me to answer question number 3?

Tom Rodgers is the director of purchasing of Dart Industries. Tom is responsible for booking 1,000 rooms per month in the city that houses his company's corporate office. Tom approaches you, the DOSM/RM of the local Hawthorne Suites hotel, with a proposition. Instead of paying $159.99 per night; your hotel's normal room rate for corporate travelers, he proposes the following rate structure: