Calculate electricity costs for different kWh consumptions using a tiered tariff system.

This falls into the 51-350 kWh block. $190 \text{ kWh} \times \text{R}1.0755/\text{kWh} = \text{R}204.345$ Total cost: $\text{R}39.93 + \text{R}204.345 = \text{R}244.275$ Rounded to two decimal places, the total cost is $\boxed{\text{R}244.28}$.

3. To calculate the cost for 360 kWh of electricity:

This falls into the 51-350 kWh block. $300 \text{ kWh} \times \text{R}1.0755/\text{kWh} = \text{R}322.65$

This falls into the 351-600 kWh block. $10 \text{ kWh} \times \text{R}1.4356/\text{kWh} = \text{R}14.356$ Total cost: $\text{R}39.93 + \text{R}322.65 + \text{R}14.356 = \text{R}376.936$ Rounded to two decimal places, the total cost is $\boxed{\text{R}376.94}$.

4. Some municipalities provide free basic water because water is considered a fundamental human right essential for survival, health, and sanitation. Electricity, while important, is generally not considered as critical for basic survival as water, and providing free electricity could be financially unsustainable or lead to excessive consumption.

TELEPHONE TARIFFS

1. The telephone cost is R199 even for zero minutes of calls because this amount represents the monthly rental fee for the landline service, which is a fixed charge regardless of usage.

2. To calculate the values of A and B: The total cost is the monthly rental (R199) plus R0.75 per minute of calls.

   • Value of A (for 4 minutes): $$\text{A} = \text{R}199 + (4 \text{ minutes} \times \text{R}0.75/\text{minute})$$ $$\text{A} = \text{R}199 + \text{R}3.00$$ $$\text{A} = \boxed{\text{R}202.00}$$
   • Value of B (when cost is R206.50): $$\text{R}206.50 = \text{R}199 + (\text{B} \text{ minutes} \times \text{R}0.75/\text{minute})$$ $$\text{R}206.50 - \text{R}199 = \text{B} \times \text{R}0.75$$ $$\text{R}7.50 = \text{B} \times \text{R}0.75$$ $$\text{B} = \frac{\text{R}7.50}{\text{R}0.75}$$ $$\text{B} = \boxed{10}$$