SMS Cost Calculation:
1) assumption:
- 100 seats
- 2 seats per registration
- each registration last for 1 hour
- each day has 14 hours (9am - 11pm)
2) say 0.376 per sms
3) then cost for 1 shop = (100/2) x 14 x 0.376 = 263.2
4) say 20 shops
5) then cost for 1 day = 263.2 x 20 = 5,264
6) 30 days a month
7) then cost for 1 month = 5,264 x 30 = 157,920
