Patty Duncan is a broker of hotel rooms in Europe. To tour directors, she offers a standard trade discount of40% off the list price. She has additional discounts of 20% and 10%, which are based on the number of toursin a season and the total number of tourists. Compute the equivalent single discount rate for tour organizer Kristi Atchison who qualifies for all three discounts.
a. First complement rate
b. Second complement rate
c. Third complement rate
d. Equivalent single discount rate