Based on a water tariff table, calculate costs for Block 3 and a total of 14 kilolitres of usage.

Block 3 corresponds to a volume of $>10 \text{ k}\ell - 15 \text{ k}\ell$.

The water rate for Block 3 is R13,08.

• R13,08 per k$\ell$

This block covers 4 k$\ell$ (from 6 k$\ell$ to 10 k$\ell$).

The total usage is 14 k$\ell$. After Block 1 (6 k$\ell$) and Block 2 (4 k$\ell$), the remaining volume is $14 \text{ k}\ell - 6 \text{ k}\ell - 4 \text{ k}\ell = 4 \text{ k}\ell$. This remaining 4 k$\ell$ falls into Block 3.

• R81.12

Let $C$ be the cost before VAT.
VAT is 15%, so the total bill is $C + 0.15C = 1.15C$.

• R160.00