Cost of living in Al Mubarraz (Saudi Arabia) is 11% cheaper than in Adelaide (Australia)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 649 prices entered by 96 different people.
For example, to keep the same standard of living that would require AU$7,700 in Adelaide you would need to make just about AU$6,862 (﷼ 20,516) in Al Mubarraz.