To convert R14 800 to US Dollars (USD) using the exchange rate 1 = R16.53:

$$\text{Amount in USD} = \frac{\text{R}14800}{\text{R}16.53/\text{USD}}$$ $$\text{Amount in USD} \approx \text{USD } 895.34$$

Sipho's R14 800 is approximately:

$$\boxed{\text{USD } 895.34}$$

1.3.2
To determine the price of the laptop in South African rand, given the laptop costs $820 and the new exchange rate is$1 = R19.80$:

$$\text{Price in ZAR} = \text{USD } 820 \times \text{R}19.80/\text{USD}$$ $$\text{Price in ZAR} = \text{R}16236.00$$

The price of the laptop in South African rand is:

$$\boxed{\text{R}16236.00}$$

1.3.3
A weak rand means that more South African rand are needed to buy one unit of foreign currency (like the US Dollar). This directly affects South African consumers buying imported goods because the cost of these goods, when converted back into rand, becomes more expensive. Consumers will have to pay a higher price in rand for the same imported items, which reduces their purchasing power.

2.1
A tariff is a charge or a list of charges for services provided. In this context, it refers to the pricing structure for mobile phone calls and data usage offered by a service provider.

2.2
An advantage of Option A (Contract) is that it offers a fixed monthly fee which includes a set number of minutes. This provides predictability in monthly spending, making it easier for Lelo to budget, especially if her call usage is consistent and within the included minutes.

2.3
To calculate the total monthly cost for Option B if Lelo uses 250 minutes of calls and identify the cheaper option:

Option A has a fixed monthly fee of R220 and includes 300 minutes. Since 250 minutes is less than 300 minutes, there are no extra call costs.

$$\text{Cost for Option A} = \text{R}220$$

Option B has no monthly fee, and the call cost is R2.30 per minute.

$$\text{Cost for Option B} = 250 \text{ minutes} \times \text{R}2.30/\text{minute} = \text{R}575.00$$

$$\text{Option A cost} = \text{R}220$$ $$\text{Option B cost} = \text{R}575.00$$

Since $\text{R}220 < \text{R}575.00$, Option A is cheaper.
The total monthly cost for Option B is $\boxed{\text{R}575.00}$, and the cheaper option for using 250 minutes is Option A.

2.4
Choosing the wrong tariff can significantly affect Lelo's monthly budget by leading to unnecessary expenditure. If Lelo chooses a contract (Option A) but uses very few minutes, she would be paying a fixed fee for minutes she doesn't utilize. Conversely, if she chooses a pay-as-you-go tariff (Option B) but makes many calls, the per-minute costs can quickly accumulate to a much higher total than a contract, causing her to overspend and potentially exceed her budget for communication, leaving less money for other essential expenses or savings.