Answer:
Total consumer surplus is $12
Explanation:
Consumer surplus refers to the benefit derived by the consumer from the amount he is willing to pay as against market price. For example, Glee is willing to pay $10 for a product. The market price of the product is $5. His consumer surplus will be $5 (benefit).
Here, market price is $5.
Buyer is willing to spend $10 for first unit. Consumer surplus is $5 (10 - 5)
Buyer is willing to spend $9 for second unit. Consumer surplus is $4 (9 - 5)
Buyer is willing to spend $8 for third unit. Consumer surplus is $3 (8 - 5)
Total consumer surplus is $12 (5 + 4 + 3)