According to the contract, the three companies share equally, so the money payable by the three companies is the same, 900 thousand, and each company has 6 cars.

Company C should pay 900,000 yuan, which means that a car is 90/6 = 1.5 million yuan.

Then Company A pays 15 * 10 = 1.5 million yuan, and Company B pays 15 * 8 = 1.2 million yuan.

Therefore, Company C should give Company A150-90 = 600,000 yuan and Company B120-90 = 300,000 yuan.

profit

The Olympic Mathematics is relatively in-depth, and the vigorous development of mathematical olympiad has greatly stimulated children's interest in learning mathematics, which has become a useful activity to guide them to be positive, explore actively and grow healthily. There are many practical problems, such as counting, graph theory, logic, pigeon hole principle and so on.

To solve this kind of problem, it is generally necessary to analyze and summarize the mathematical significance of the actual problem, abstract the actual problem into a mathematical problem, and then use the corresponding mathematical knowledge and methods to solve it.