Look at the usage on your bill.
Example Number 1
Water usage is 35 (means 3,500 gallons as you are billed in hundreds)
- 35 - 25 = $25.05
- 10 x .899 = $ 8.99
- Sub-total $34.04 + 7% tax = $2.39
- Total $36.43
Example Number 2
Water usage is 87 (means 8,700 gallons as you are billed in hundreds)
- 87 - 25 = $ 25.05
- 62 - 50 = $44.95
- 12 x .784 = $ 9.68
- Sub-total $79.68 + 7% tax 5.58
- Total $85.26