Confirm this unit is 62000 In Hm3 of total reading or current difference from previous reading?
Now days in Islamabad the basic Calculation is as below.
Difference of Unit from previous reading of meter & current reading for Example
124 Unit hm3 previous reading
212 Unit hm3 Current reading
Difference of reading is 88 Unit hm3 (These values are given on your Bill)
To convert the hm3 in to mmbtu SUI current Factor is 3.74
So 0.88 hm3 X 3.74 = 3.29 mmbtu (THis values is also given on bill not the Conversion Factor 3.74)
There are 3 slabs now days on Bill
1 upto 1.0 hm3 (ours is 0.88 hm3. so we use this slab) in this slab the mmbtu price is 110 Rs per mmbtu unit so total Gas charges will be 3.29 mmbtu Unit X 110 Rs = 361.9 RS
now there are extra charges also like meter Rent 20 RS
GST 17% of Gas Charges (361.9) + Meter Rent (20) = 382 RS so 17 % of 382 = 64.94
Total Bill will be 446.84 RS that will come & you have to pay it.
if the hm3 difference goes up to 1.0 to 3.0 hm3 the mmbtu values per unit will be 220 Rs (This is Slab 2)
if the hm3 difference goes Above 3.0 hm3 the mmbtu values per unit will be 600 Rs (This is Slab 3)