In July, a company had 600 employees, each paid $15 per hour, working 8 hours a day, five days a week, 4 weeks a month. In August, due to a 25% increase in workload, the company hired an additional 150 employees. How much more money does the company pay in total per month in August compared to July? Let's think step by step and output the final answer within \boxed{}.
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