Pjbas operates a bus sightseeing tour of Putrajaya. Below is the operating cost depending on the number of tickets sold for the first four months of operation. Month Tickets sold Cost (RM) Jan 10,000 60,000 Feb 7,500 40,000 Mar 6,000 50,000 Apr 5,500 55,000 Using the High-Low method, calculate the monthly fixed operating cost OA RM48,889 OB. RM31,667 OC. RM35,000 OD RM20,000