Economics - Term 1 - Week 3

Imagine Sipho in Khayelitsha with R30. He can either buy a kota for lunch or use the money for a minibus taxi to soccer practice. He cannot do both. This is a classic example of scarcity: limited resources force us to choose. The thing you give up when you make a choice is called the opportunity cost. In Sipho’s case, if he chooses the taxi, his opportunity cost is the kota he cannot eat. The concept of opportunity cost is not just for big businesses or government budgets—it’s part of daily life in South Africa. Whether it’s choosing between buying data or airtime, or deciding to study instead of working part-time, every choice has a cost. This is the foundation of economics: understanding that resources are limited, so every decision means giving up something else.

Thandi in Polokwane faces a different choice: should she spend Saturday studying for her Grade 10 Economics test, or help her family at the spaza shop? If she studies, she misses out on earning money and helping her family. If she works, she might not do as well in her test. Opportunity cost is not always about money—it can also be time, experiences, or even relationships. Many learners think opportunity cost is just the price of what you buy, but it’s actually the value of the next best alternative you give up. For example, if Thandi chooses to study, her opportunity cost is the money and experience she would have gained at the shop. This helps us see that opportunity cost is about what is sacrificed, not just what is spent.

The South African government also faces opportunity costs. For example, if the government decides to spend more on building new schools in Mthatha, it may have less money to spend on hospitals or fixing potholes in Durban. The opportunity cost of building schools is the other projects that cannot be funded. This is why government budgets are always about trade-offs. A common misconception is that opportunity cost is only a personal issue, but it affects everyone, from individuals to the whole country. Understanding opportunity cost helps us evaluate if resources are being used in the best way possible, whether it’s a family budget or the national budget.

Lerato dreams of playing for Banyana Banyana, but she also wants to pass matric with distinctions. She must decide how to spend her time after school: extra soccer practice or extra study sessions. The opportunity cost of each choice could shape her future. If she chooses soccer, she might miss out on top marks; if she chooses studying, she might lose her chance to impress scouts. Recognising opportunity costs helps you make smarter decisions, not just for exams, but for life. In the NSC Economics exam, you’ll be asked to identify, calculate, and analyse opportunity costs in different scenarios. Practising this skill now will help you in Paper 1, especially in short-answer and data-response questions.

Step 1: Identify the options. Ahmed in Soweto has R50. He can buy 1 GB of data for R50 or use the money for two minibus taxi rides at R25 each. Step 2: Decide which option Ahmed chooses. Suppose he buys the data. Step 3: Identify the next best alternative. The next best alternative is taking two taxi rides. Step 4: State the opportunity cost. The opportunity cost of buying data is the two taxi rides Ahmed cannot take. Step 5: Sanity check: Could Ahmed have done both? No, because he only has R50. Final answer: The opportunity cost of buying data is the two taxi rides forgone.

Step 1: Identify the scenario. The government has R10 million to spend in Polokwane. It can build a new clinic or upgrade the local soccer stadium. Step 2: Choose the option. The government decides to build the clinic. Step 3: Identify the next best alternative. Upgrading the soccer stadium is the next best alternative. Step 4: State the opportunity cost. The opportunity cost of building the clinic is the upgraded stadium that will not be built. Step 5: Sanity check: Is there enough money for both? No, only one can be chosen. Final answer: The opportunity cost of building the clinic is the stadium upgrade forgone.

Question: Sipho has R20. He can buy airtime or a vetkoek for lunch. Which is the opportunity cost if he buys the vetkoek? Let’s think: What does Sipho give up by making this choice? If he buys the vetkoek, he cannot buy airtime. So, the opportunity cost is the airtime. Model answer: The opportunity cost of buying the vetkoek is the airtime Sipho cannot buy. Now you try: If Sipho buys the airtime, what is the opportunity cost? Think about what he gives up. Answer: The vetkoek. The opportunity cost is always the next best thing you cannot have because of your choice.

Question: Lerato can attend extra maths lessons after school or work at her uncle’s tuckshop for R50. She chooses the extra lessons. What is her opportunity cost? Let’s break it down: She gives up the R50 and work experience she would have gained at the tuckshop. Model answer: The opportunity cost is the R50 and work experience at the tuckshop. Your turn: If she chooses the tuckshop job, what is her opportunity cost? Think about what she cannot do if she works. Answer: The extra maths lessons. This shows how every choice, even at school, has an opportunity cost that can affect your future.

1. Define opportunity cost in your own words, using a real example from your life. 2. List two examples of opportunity cost you have faced this week, such as choosing between homework and chores. 3. Name one reason why understanding opportunity cost is important for making good decisions, both now and in the future.

1. Calculate the opportunity cost: You have R40. You can buy a Springboks cap or a meal. You choose the cap. What is your opportunity cost? 2. Explain the opportunity cost if your school spends money on new computers instead of sports equipment. 3. Identify the opportunity cost in this scenario: The municipality fixes street lights instead of building a new park. Give reasons for your answer.

1. Analyse: A family in Durban must choose between paying for electricity during load-shedding or buying groceries. What is the opportunity cost of each choice? Explain your reasoning. 2. Justify: Why should government leaders always consider opportunity cost when making budget decisions? Give at least two reasons. 3. Compare: How does opportunity cost affect individuals differently from government? Use examples to support your answer.

• The money you spend on something
• The next best alternative forgone
• The profit you make from a choice
• The total cost of all options

Answer: The next best alternative forgone

Many confuse opportunity cost with the money spent, but it is actually what you give up when you make a choice. The next best alternative is not always about money, but about what you miss out on.

• The money she earns
• The time spent at the shop
• The study time and potential higher marks
• The cost of transport

Answer: The study time and potential higher marks

Her opportunity cost is the value of what she gives up—the time she could have spent studying and the higher marks she might have achieved. Many learners mistakenly think it's just about money, but it's about the next best use of her time.

• Building a new road instead of a clinic
• Raising taxes
• Lowering interest rates
• Increasing exports

Answer: Building a new road instead of a clinic

Opportunity cost in government is about what project is not chosen. If the government builds a road, the clinic is the next best alternative forgone. The other options are not direct choices between alternatives.

• The taxi ride
• The lunch he cannot buy
• The R30 he spends
• The time spent travelling

Answer: The lunch he cannot buy

The opportunity cost is the lunch, because that is what Sipho gives up by choosing the taxi ride. Many confuse the cost with the actual choice, but it is always the next best thing you cannot have.

• Choosing to study instead of watching TV
• Buying a kota instead of a burger
• Paying for both data and airtime