A taxi driver has to decide whether to rent or buy a car for his job. On one hand, if he rents it, the rental fee would be SR per month (on a yearly basis), and the cost for gas would be SR for every working day. On the other hand, if he buys it, his fixed annual cost would be SR , and daily operating and maintenance costs would be SR for each day the car is used. What is the least number of days each year the car has to be used in order to justify renting it rather than buying it?