How to calculate the phone bill for sending 50 yuan to Shenzhen Telecom in a 4 trillion group purchase? How much is a local call and a domestic call per minute?
0.22 yuan for the first 3 minutes locally, 0. 1 1 yuan/minute later, 0.29 yuan/minute before1/808 for domestic calls, and 0.09 yuan/minute after 1 1 minute.