Lena Olin, the Accountant at Mystique Hotel in Victoria, is preparing a report on the financial performance of the hotel in February $2024.$ She is using this formula: $($Total Rooms Revenue $-$ Controllable Expenses$)/$ Rooms Available to Sell. What does Lena calculate?

a$.$

RevPar

b$.$

ADR

c$.$

Occupancy percentage

d$.$

GOPPAR