How much is the bus fare from Kunming to Jiangchuan?

The first price within 3 kg is 12 yuan, and the second price per kg is 2 yuan. According to the regulations of large-scale city passenger transport center, the bus from Kunming to Jiangchuan carries goods with a first weight of less than 3 kg, and the price is 12 yuan, and the price per kg is 2 yuan. Bus originated from the transliteration of bus in English, and it is a large bus, compared with medium-sized buses and small buses.