The provided solution refers to "Gold package" and "Economy package" costs based on "Time (n)" and "Cost (C)". It calculates fixed costs, cost per minute, and formulates equations for these packages.

From the table for the Gold package:
When Time ($n$) is 0 minutes, the Cost is R40. This is the fixed cost.
When Time ($n$) is 10 minutes, the Cost is R45.
The increase in cost for 10 minutes is $\text{R}45 - \text{R}40 = \text{R}5$.

Cost per minute $= \frac{\text{Change in Cost}}{\text{Change in Time}} = \frac{\text{R}5}{10 \text{ minutes}} = \text{R}0.50 \text{ per minute}$.

The formula for the Gold package is $\text{Cost} = \text{Fixed Cost} + (\text{Cost per minute} \times n)$.

The formula for calculating the Gold package is $\boxed{\text{R}40 + \text{R}0.50 \times n}$.

2.1.2

The formula for the Economy package is given as $C = \text{R}20 + \text{R}1 \times n$.
From the table, A is the cost when $n=30$ minutes.

The formula for the Gold package is $C = \text{R}40 + \text{R}0.50 \times n$.
From the table, B is the cost when $n=250$ minutes.

The values are $\boxed{A = 50 \text{ and } B = 165}$.

2.1.3

To draw the graphs, we will plot points for each package and connect them with a straight line.
Let $n$ be the time in minutes (x-axis) and $C$ be the cost in rands (y-axis).

Economy Package ($C_E = 20 + n$):

• (0, 20)
• (10, 30)
• (20, 40)
• (30, 50)
• (100, 120)
• (250, 270)
• (600, 620)

Gold Package ($C_G = 40 + 0.5n$):

• (0, 40)
• (10, 45)
• (20, 50)
• (30, 55)
• (100, 90)
• (250, 165)
• (600, 340)

Intersection Point:
To find where the costs are equal, set $C_E = C_G$:

At $n=40$ minutes, $C_E = 20 + 40 = 60$ and $C_G = 40 + 0.5(40) = 40 + 20 = 60$.
The intersection point is (40, 60).

Graphing Instructions:

1. Draw a set of axes. Label the x-axis "Time (minutes)" and the y-axis "Cost (Rands)".
2. Choose an appropriate scale for both axes. For example, the x-axis can go from 0 to 600 (e.g., increments of 50 or 100), and the y-axis can go from 0 to 650 (e.g., increments of 50 or 100).
3. Plot the points for the Economy package and draw a straight line through them. Label this line "Economy Package".
4. Plot the points for the Gold package and draw a straight line through them. Label this line "Gold Package".
5. Ensure both lines intersect at the point (40, 60).

2.1.4

Using the formula $C_E = \text{R}20 + \text{R}1 \times n$:

Using the formula $C_G = \text{R}40 + \text{R}0.50 \times n$:

For 32 minutes:
Economy package cost = R52
Gold package cost = R56
Since $\text{R}52 < \text{R}56$, the Economy package is cheaper for 32 minutes.
Therefore, Mondli's argument is $\boxed{\text{incorrect}}$.