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What is Marginal Cost?
Grade Level:
Class 12
AI/ML, Physics, Biotechnology, FinTech, EVs, Space Technology, Climate Science, Blockchain, Medicine, Engineering, Law, Economics
Definition
What is it?
Marginal Cost is the extra cost a company bears to produce one additional unit of a good or service. It helps businesses understand how much more expensive it gets to make 'just one more' item.
Simple Example
Quick Example
Imagine you run a small chai stall. Making 100 cups of chai costs you ₹1000. If making 101 cups of chai costs you ₹1008, then the marginal cost of that 101st cup is ₹8 (₹1008 - ₹1000).
Worked Example
Step-by-Step
Let's say a toy factory makes 50 toy cars for a total cost of ₹5000.
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To meet a new order, they decide to make one more toy car, bringing the total to 51 toy cars.
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The total cost to make 51 toy cars becomes ₹5075.
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To find the marginal cost, we subtract the old total cost from the new total cost.
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Marginal Cost = Total Cost of 51 cars - Total Cost of 50 cars
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Marginal Cost = ₹5075 - ₹5000
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Marginal Cost = ₹75.
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So, the marginal cost of producing the 51st toy car is ₹75.
Why It Matters
Understanding marginal cost is super important for businesses, from a small dosa shop to big tech companies. It helps managers in FinTech decide pricing strategies, engineers in EV manufacturing plan production, and even doctors in healthcare manage resources efficiently. Learning this helps you think like a business leader!
Common Mistakes
MISTAKE: Confusing marginal cost with average cost. | CORRECTION: Marginal cost is the cost of ONE additional unit, while average cost is the total cost divided by the total number of units.
MISTAKE: Forgetting to only consider the change in total cost. | CORRECTION: Always calculate the difference in total cost when production increases by just one unit.
MISTAKE: Assuming marginal cost is always constant. | CORRECTION: Marginal cost can change as production increases, often decreasing initially due to efficiency and then increasing due to resource scarcity.
Practice Questions
Try It Yourself
QUESTION: A bakery makes 10 cakes for ₹1500. If they make 11 cakes, the total cost is ₹1620. What is the marginal cost of the 11th cake? | ANSWER: ₹120
QUESTION: A mobile app developer's total cost for hosting 1000 users is ₹5000. If adding one more user increases the total cost to ₹5005.50, what is the marginal cost for that 1001st user? | ANSWER: ₹5.50
QUESTION: A farmer grows 50 kg of tomatoes for ₹2000. If growing 55 kg of tomatoes costs ₹2150, what is the average marginal cost per kg for the extra 5 kg? (Hint: Find the total extra cost, then divide by the extra quantity). | ANSWER: ₹30 per kg
MCQ
Quick Quiz
Which of the following best describes Marginal Cost?
The total cost of production
The average cost per unit produced
The additional cost of producing one more unit
The fixed costs of a business
The Correct Answer Is:
C
Marginal cost specifically refers to the change in total cost when one more unit is produced. Options A, B, and D describe other cost concepts.
Real World Connection
In the Real World
Think about online food delivery apps like Swiggy or Zomato. When they decide to deliver one more order, they calculate the marginal cost – this includes extra fuel for the delivery rider, packaging, and a small part of the rider's salary. This helps them set delivery fees and decide if taking more orders is profitable.
Key Vocabulary
Key Terms
TOTAL COST: The entire expense of producing a certain quantity of goods or services | ADDITIONAL UNIT: One extra item or service produced | PRODUCTION: The process of making goods or services | PROFIT: The money left after all costs are subtracted from revenue
What's Next
What to Learn Next
Now that you understand Marginal Cost, you should explore 'Marginal Revenue'. This concept helps businesses understand how much extra money they earn from selling one more unit, which is crucial for making smart pricing decisions.
