For example, the village cooperative sells fertilizer. The retail price you see in the fertilizer shop on the Ctrip App is 100 yuan per bag for individual customers. But a large enterprise in the village wants to make a bulk purchase, so they approach the cooperative's director. Ctrip's corporate client department says, "I will buy 10,000 bags annually through your account, but you need to help me with the accounting." The director offers two prices: - Public wholesale price: 70 yuan, ostensibly saving the enterprise 30% - Actual cost price: The director's bulk purchase price from the fertilizer factory is actually 50 yuan. The profit can be squeezed from these three gaps: Gap 1: The enterprise pays 70 yuan, while Ctrip's purchase price is 50 yuan...