Elasticity and total revenue

Q: What is the definition and formula for Total Revenue (TR)?

Total Revenue is the total amount of money a business receives from selling its products, calculated as $ TR = Price \times Quantity $.

Q: What is the key distinction between Total Revenue and profit?

Total Revenue is the gross money coming in from sales, whereas profit is what remains after all expenses (like rent and materials) are paid.

Q: How does the Law of Demand complicate the effect of a price increase on Total Revenue?

A price increase raises the money earned per unit but simultaneously triggers a decrease in the quantity sold, creating a conflict that elasticity must resolve.

Q: How does a price increase affect Total Revenue when demand is inelastic (\( PED?

If demand is inelastic, an increase in price will lead to an increase in Total Revenue.

BA1 – Fundamentals of Business Economics · CIMA (CGMA Professional Qualification) · 5 min read

Welcome to the World of Elasticity and Revenue!

In this chapter, we are going to look at one of the most important decisions a business manager has to make: "If I change my price, what happens to my total money coming in?"

Don't worry if numbers and graphs usually make you feel a bit nervous. We are going to break this down using simple logic and real-world examples. By the end of these notes, you'll see exactly why a local coffee shop might raise prices while a cinema offers discounts—and how Elasticity explains it all!

1. What is Total Revenue (TR)?

Before we dive into elasticity, let’s define Total Revenue. It is simply the total amount of money a business receives from selling its products or services.

The formula is very simple:
$ TR = Price \times Quantity $

Example: If you sell 100 notebooks at $ \$5 $ each, your Total Revenue is $ 100 \times \$5 = \$500 $.

Important Note: Total Revenue is not the same as profit. Revenue is the money coming into the till before you pay for any expenses like rent or materials.

2. The Relationship Between Price and Revenue

If you raise your price, you get more money per unit sold. BUT, according to the Law of Demand, your quantity sold will usually drop. The big question is: Does the higher price make up for the lost sales?

This is where Price Elasticity of Demand (PED) comes in. It tells us how sensitive customers are to a price change.

Scenario A: Inelastic Demand (The "Need-to-Have" Items)

When demand is Inelastic (PED is less than 1), customers are not very sensitive to price changes. They might complain, but they still buy the product because they need it or there are few substitutes (like petrol or life-saving medicine).

The Rule:
- If Price increases, Total Revenue increases.
- If Price decreases, Total Revenue decreases.

Analogy: Imagine a petrol station. If they raise the price by 10%, most people still have to drive to work, so they only buy 2% less fuel. The gain from the higher price is much bigger than the loss from the few people who stopped driving. Result: More money in the till!

Scenario B: Elastic Demand (The "Easy-to-Swap" Items)

When demand is Elastic (PED is greater than 1), customers are very sensitive. If the price goes up even a little, they will switch to a cheaper brand or stop buying it altogether.

The Rule:
- If Price increases, Total Revenue decreases.
- If Price decreases, Total Revenue increases.

Analogy: Imagine two identical fruit stalls. If Stall A raises the price of bananas, customers will just walk two meters to Stall B. Stall A loses so many customers that their Total Revenue crashes. However, if Stall A holds a "Sale" and lowers the price, they might attract everyone from the market, and their Total Revenue will jump up!

Scenario C: Unitary Elasticity

When demand is Unitary (PED is exactly 1), any change in price is perfectly offset by the change in quantity.

The Rule: Total Revenue remains unchanged if the price moves up or down.

Quick Review: The Revenue Direction Trick

To remember this easily, look at the movement of Price and Revenue:
- Inelastic: Price and Revenue move in the SAME direction. (Price up? Revenue up!)
- Elastic: Price and Revenue move in OPPOSITE directions. (Price up? Revenue down!)

3. Summary Table for Your Revision

Here is a handy guide you can use to check your logic during the exam:

1. Elastic Demand ($ PED > 1 $): Price Up $\rightarrow$ Revenue Down | Price Down $\rightarrow$ Revenue Up
2. Inelastic Demand ($ PED < 1 $): Price Up $\rightarrow$ Revenue Up | Price Down $\rightarrow$ Revenue Down
3. Unitary Elasticity ($ PED = 1 $): Price Up $\rightarrow$ Revenue Unchanged | Price Down $\rightarrow$ Revenue Unchanged

4. Why Does This Matter for Business Managers?

Managers use this information to set pricing strategies. If a business knows its brand is very strong and customers are loyal (Inelastic), it might raise prices to boost revenue. If a business is in a crowded market with many competitors (Elastic), it might use "penetration pricing" (low prices) to steal market share and increase revenue through high volume.

Did you know?

Airlines are masters of this! They know business travelers have Inelastic demand (they must get to that meeting), so they charge high prices for last-minute bookings. Leisure travelers have Elastic demand (they can just stay home or go elsewhere), so airlines offer cheap "early bird" discounts to fill seats.

5. Common Mistakes to Avoid

Mistake 1: Confusing Revenue with Profit.
Always remember: Increasing revenue is great, but if your costs increase even more, your profit will still go down. This chapter only focuses on the money coming in.

Mistake 2: Thinking "Elastic" means "Expensive."
Elasticity isn't about the price tag; it's about the reaction. A cheap chocolate bar can have elastic demand if there are 20 other brands of chocolate bars next to it on the shelf.

Key Takeaways

- Total Revenue is Price multiplied by Quantity.
- If you want to increase revenue for an Inelastic product, raise the price.
- If you want to increase revenue for an Elastic product, lower the price.
- Unitary elasticity means the total revenue has reached its maximum point and won't change with small price shifts.

Don't worry if this feels like a lot of "up and down" arrows to memorize! Just think about yourself as a shopper: If the price of your favorite luxury perfume goes up, you might stop buying it (Elastic). If the price of the electricity for your house goes up, you'll pay it anyway (Inelastic). Apply that logic to the formulas, and you'll do great!

Quick check

Can you answer these now?

Open each question to check the key ideas from this chapter.

What is the definition and formula for Total Revenue (TR)?

Total Revenue is the total amount of money a business receives from selling its products, calculated as $ TR = Price \times Quantity $.

What is the key distinction between Total Revenue and profit?

Total Revenue is the gross money coming in from sales, whereas profit is what remains after all expenses (like rent and materials) are paid.

How does the Law of Demand complicate the effect of a price increase on Total Revenue?

A price increase raises the money earned per unit but simultaneously triggers a decrease in the quantity sold, creating a conflict that elasticity must resolve.

How does a price increase affect Total Revenue when demand is inelastic ($ PED < 1 $)?

If demand is inelastic, an increase in price will lead to an increase in Total Revenue.

What happens to Total Revenue when a business raises the price of a product with elastic demand ($ PED > 1 $)?

If demand is elastic, a price increase will cause Total Revenue to decrease.

What is the effect of a price change on Total Revenue when demand is Unitary ($ PED = 1 $)?

Total Revenue remains unchanged when the price changes, as the percentage change in price is exactly offset by the percentage change in quantity.

What is the 'Revenue Direction Trick' for identifying inelastic versus elastic demand?

For inelastic demand, Price and Revenue move in the same direction; for elastic demand, they move in opposite directions.

How do managers use elasticity to determine pricing strategies in different market types?

Managers raise prices for products with inelastic demand to boost revenue, while they may use low prices for elastic products to gain market share through high volume.

How do airlines apply the concept of elasticity to different customer segments?

Airlines charge high prices to business travelers (inelastic demand) and offer discounts to leisure travelers (elastic demand) to maximize total revenue.

Does 'elastic demand' mean that a product is expensive?

No; elasticity measures the sensitivity of consumers to price changes, not the price level of the item itself.

Ready to test yourself?

Turn these notes into exam-style practice. Get unlimited AI questions on this topic with instant marking and explanations.

Practice This Topic

More BA1 – Fundamentals of Business Economics chapters

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

Put These Notes into Practice

Reading the notes is a great start. Now practise with unlimited AI-generated questions and get instant feedback. 100,000+ students are already improving their grades.

Start Practising Now View Pricing

Done reading? Test yourself with AI practice questions

Practice This Topic Now