Each compressor can be used for the life cycle of 2 tractors; the warranty is three years and the screw lifetime warranty. (The warranty period is only replaced without repair, and the extended premium is properly charged); only need to replace the oil once a year, the annual cost is about 500 yuan, the three-year cost is about 1500 yuan, compared with traditional compressors, it saves you 10,000 yuan, Greatly save you maintenance costs.

Three-year total profit: 48,250 yuan
20250 (more earning) +18000 (fuel saving) +10000 (maintenance saving)