ANNEXURE A shows an extract from Mr Daniels' monthly municipal statement including the residential water and sewer tariff tables - NSC Mathematical Literacy - Question 2 - 2019 - Paper 1

To calculate the VAT amount, use the VAT rate of 15%. Based on the sewer monthly charge, use the formula: ext{VAT Amount} = ext{Sewer Charge} imes rac{15}{100} For instance, if the sewer charge is R836.02: ext{VAT Amount} = 836.02 imes rac{15}{100} = R125.40

The unit of measurement used for the meter readings is liters (L).

The value of A is R961.42. This value is taken directly from the relevant table in ANNEXURE A.

To calculate the total amount for water usage (value of B), identify the applicable usage range in the stepped residential tariff table. For example, if the total consumption is 20 m³:

• First slice: R0.00 for the first 6 m³,
• Second slice: R18.75 per m³ for the next 6 m³,
• Third slice: R35.00 per m³ for the next 8 m³.

The calculations will be:

$ext{Total} = (6 imes 0) + (6 imes 18.75) + (8 imes 35)$

This results in: $ext{Total} = 0 + 112.50 + 280 = R392.50$

Thus, the value of B is R392.50.