SOLUTION: The increasing block tariffs per month for residential electricity for the 2016/2017 financial year are given below. The tariffs do not include VAT. Domestic supply / Usage

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Question 1110034: The increasing block tariffs per month for residential electricity for the 2016/2017 financial year are given
below. The tariffs do not include VAT.
Domestic supply / Usage in kWh Rand per kWh (kilowatt hour)
0-100 kWh / R1,3032
101-400 kWh / R1,5250
401-650 kWh / R1,6610
More than 650kWh / R1,79
What will the electricity bill (without VAT) be for a month in which a household uses 600 kWh of electricity?
options of answers
[1] R996,00
[2] R2 693,52
[3] R920,02
[4] R1 072,52

If a 0-100kWh is = 1,3032
therefore 600 times 1,3032 = 781,92
with out VAT IT will be 114 devided by 100
1,14 times 781, 92 giving me 891,388 which does not match the options above.
please assist

Found 2 solutions by rothauserc, Boreal:
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
the household used 600 kWh
:
100 kWh at R1,3032 per kWh = R130,32
300 kWh at R1,5250 per kWh = R457,5
200 kWh at R1,6610 per kWh = R332,2
:
Total is R920,02
:
Answer is 3

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
0-100 kWh / R1,3032
101-400 kWh / R1,5250
401-650 kWh / R1,6610
More than 650kWh / R1,79
What will the electricity bill (without VAT) be for a month in which a household uses 600 kWh of electricity?
The k is already there
first 100 is 1.3032 per or 130.32
101-400 is 300 at 1.525 or 457.5
the last 200 (from 400 to 600) are at 1.661 or 200*1.661 or 332.2
Add 130.32+457.5+332.2=920.02
[3]
options of answers
[1] R996,00
[2] R2 693,52
[3] R920,02
[4] R1 072,52