How to charge for Beijing Unicom Wojia 4G package?

Beijing Unicom Wo Jia 4G package only introduces products (buy 6 get free in seven months1; Buy 10, give 2 a year; Buy 18 and get 6 for two years; Buy 24 in three years and get 12). The specific tariffs are as follows:

(4 MB/1000 MB) Urban area: 7 months 1008 yuan, 24 months 1680 yuan, 36 months 4032 yuan;

(4MB/ 100MB) Suburbs (Tongzhou, Changping, Daxing, Shunyi, Fangshan and Mentougou): 888 yuan for 7 months, 12 months 1480 yuan, 3552 yuan for 24 months;

(4 MB/1000 MB) Outer suburbs (Miyun, Huairou, Pinggu and Yanqing): 648 yuan for 7 months, 2592 yuan for 02 months 1080 yuan for 24 months 1944 yuan for 36 months;

(200 MB): 7 months 1 188 yuan, 12 months 1980 yuan, 3,564 yuan for 24 months and 4,752 yuan for 36 months (unified charges for urban areas, near-effect areas and outer suburbs);

(500 MB)7 months 1308 yuan, 12 months 2 180 yuan, 3,924 yuan for 24 months, and 5,232 yuan for 36 months (unified charge for urban areas, peri-urban areas and outer suburbs).