Question
A factory employs three types of workers: skilled, semi-skilled, and unskilled. Skilled workers earn an average monthly salary of 40,000, semi-skilled workers earn 25,000, and unskilled workers earn 15,000. The number of skilled workers is double the number of semi-skilled workers, and the number of unskilled workers is 50% more than the number of skilled workers. If the total monthly salary of all workers combined is 4,500,000, how many workers are there in total?
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