How much does war cost?

There was a gangster who threatened me before, saying his older brother supports 200 brothers every day, ready to crush me at any time.
I calculated for him: 200 people, each spending 100 yuan a day on food and cigarettes, which adds up to 600k yuan a month.
200 people, excluding food, receive 3,000 yuan in living expenses each month, which is another 600k yuan per month. Normally, the boss's expenses are 100k yuan a month, so your brother's total monthly expenses are 1.3 million yuan. How much does he need to earn? Assuming a gross profit margin of 40% for a business, supporting this 1.3 million yuan business requires 3.25 million yuan a month.
In the end, this brother calculated it himself and quietly left. This is just the tip of the iceberg.