see this how it work i have taken Quickpower 180 which was around 1900 or something i got rs 1700 in my acc they charge tax on that thats why i got 1700
i take nu plan 9 to 9 they deducted 10 hours from my plan.1 hours = 9/per hours
9 to9 plan charge is 99/month
so i got 1601 in my acc