How much is the postage for sending coconuts?

A catty of 5-8 yuan. According to the official price list of postal express, every 500 grams is a billing unit, and the registration fee for each package is 3.00 yuan according to the delivery mileage. The first tariff in other provinces is 2 yuan, and the provincial tariff plus registration fee does not exceed 5 yuan; Ordinary packaging in the province starts at1000g, and the first charge is 3- 10 yuan. The registration fee of neighboring provinces plus 5 yuan, the farthest is 13 yuan, so the freight for mailing coconuts is generally from 5 yuan to 8 yuan per kilogram.