## 5 Analysis of Calculation Examples
### Case Calculation and Analysis of E-Commerce Logistics Alliance of Forest Products
Based on the above parameters, the cost (unit: CNY) of a single vehicle completing an e-commerce logistics enterprise of forest products goods transportation task by road transportation can be obtained as follows:  
\[Q=D_{U}O_{U}+D_{L}O_{L}+(D_{U}+D_{L})H\times 0.8+\frac{C+M+S}{n}+G+LV_{h} \tag{32}\]  
Currently, there are three e-commerce logistics enterprises of forest products located in A, which need to perform long-term cargo transportation for the forest products e-commerce enterprises in the e-commerce industrial parks; i.e., the goods are transported from the e-commerce industrial parks to the ports, and then, the freight forwarders will transfer the goods from the ports to the overseas warehouses located in foreign countries through shipping. It is difficult to predict the cost of transporting goods in this transportation process. For example, although the distance from the e-commerce park to the port is a given value, the actual distance may deviate due to factors such as weather and road conditions. For these variables, trapezoidal fuzzy numbers can be used to deal with the problem. These three e-commerce logistics enterprises of forest products are represented by Enterprise A, Enterprise B, and Enterprise C. All three enterprises undertake the transportation task from the e-commerce industrial park to the port. Among them, the volume of the goods that need to be transported in the order obtained by Enterprise A is 33 m\({}^{3}\), the weight is 8.7 tons, and the order quote is \(K_{A}=3252\); the volume of the goods that need to be transported in the order obtained by Enterprise B is 38 m\({}^{3}\), the weight is 9.8 tons, and the order quote is \(K_{B}=3447\); the volume of the goods that need to be transported in the order obtained by Enterprise C is 43 m\({}^{3}\), the weight is 10.3 tons, and the order quote is \(K_{C}=3690\). The effective loading volumes of common 20 GP and 40 GP containers are 28 m\({}^{3}\) and 58 m\({}^{3}\), respectively. It can be seen that if these three enterprises operate independently, Enterprise A, Enterprise B, and Enterprise C will need to deploy one 40 GP container truck. The relevant parameters and reference values for cost accounting are shown in Table 2.  
In this example, three assumptions are proposed:  
1. The vehicles used by the three e-commerce logistics enterprises of forest products are all the same type of tractors and trailers;
2. There is sufficient tacit understanding among the enterprises, and the alliance will not affect the quotations of the orders;
3. After the alliance of the enterprises, the orders will be merged, and the volume error of the goods loading after the order merger is ignored. Currently, the conditions of the three e-commerce logistics enterprises of forest products forming alliances, respectively, are explored. When Enterprise A and Enterprise B collaborate, the total volume of the goods reaches 71 m\({}^{3}\), and the total weight reaches 18.5 tons. In this case, one 20 GP container and one 40 GP container are required; when Enterprise A and Enterprise C join forces, the total volume is 76 m\({}^{3}\), and the total weight is 19 tons. Similarly, one 20 GP container and one 40 GP container are needed; when Enterprise B and Enterprise C cooperate closely, the total volume of the goods is 81 m\({}^{3}\), and the total weight is 20.1 tons. Still, one 20 GP container and one 40 GP container are necessary. When Enterprise A, Enterprise B, and Enterprise C collaborate together, the total volume of the goods is 114 m\({}^{3}\), and the total weight is 28.8 tons. At this point, two 40 GP containers are needed. Next, the costs and profits of three e-commerce logistics enterprises of forest products under different alliance forms are calculated, respectively. The details are presented in Table 3. Moreover, Table 3 presents the profit conditions of three e-commerce logistics enterprises of forest products before and after cooperation under different alliance forms.