Freight forwarding companies (international logistics) consider many factors when formulating international shipping quotes, which affect shipping costs and service prices. Here are some common factors that affect international shipping quotes:

1. The nature of the goods: Different types of goods may require different packaging, handling and transportation methods, so the nature of the goods will directly affect the quotation. Hazardous goods, fragile goods, special temperature requirements, etc. may increase costs.

2. Mode of transport: Different modes of transport (sea, air, road, rail, etc.) have different cost structures. Air shipping is usually faster but more expensive, sea shipping may be more economical but slower.

3. Distance and destination: Shipping distance and destination affect fuel costs, transit time and possible transit costs. Long-distance transportation usually increases costs.

4. Shipping time: Express shipping usually requires higher costs, so the logistics company may adjust the quotation according to the customer's time needs.

5. Cargo weight and volume: Shipping costs are usually proportional to the weight and volume of the cargo. Heavier or larger shipments may incur greater shipping charges.

6. Packaging and Handling: Special packaging requirements, handling and handling operations may incur additional costs. Fragile, unusually shaped shipments may require additional handling.

7. Duties and taxes: Different countries and regions may impose duties, taxes and other charges on imported goods, which may affect the final quotation.

8. Insurance: Transportation insurance is an important way to protect goods from loss, and insurance costs may be included in the quotation.

9. Value of the cargo: The value of the cargo may affect insurance costs and risk management costs. Higher value shipments may require more coverage.

10. Means of transport and space: In sea and air transport, the availability and cost of the means of transport (container, space) for the goods may affect the quotation.

11. Changes in the freight market: fluctuations in the supply and demand relationship in the freight market, changes in fuel prices, etc. may affect transportation costs, thereby affecting quotations.

12. Service type: Logistics companies provide different combinations of transportation services, such as port-to-port transportation, customs clearance, door-to-door delivery, etc. These services will also affect the overall quotation.