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The Global Insight

How does a perfectly competitive firm calculate total revenue?

Author

James Williams

Updated on February 09, 2026

The total revenue for a firm in a perfectly competitive market is the product of price and quantity (TR = P * Q). The average revenue is calculated by dividing total revenue by quantity. Marginal revenue is calculated by dividing the change in total revenue by change in quantity.

How much does a perfectly competitive firm produce?

The rule for a profit-maximizing perfectly competitive firm is to produce the level of output where Price= MR = MC, so the peanut farmer will produce a quantity of 90 packs as shown in Figure 5 (a). Remember that the area of a rectangle is equal to its base multiplied by its height.

When a firm’s total revenue exceeds its total cost?

When total revenue exceeds total cost, the firm earns an economic profit. Profit is maximized when the gap between total revenue and total cost is the largest, at 10 cans per day.

Why do perfectly competitive firms earn normal profit only in the long-run?

In perfect competition, there is freedom of entry and exit. If the industry was making supernormal profit, then new firms would enter the market until normal profits were made. This is why normal profits will be made in the long run.

Where do perfectly competitive firms maximize profit?

The profit-maximizing choice for a perfectly competitive firm will occur at the level of output where marginal revenue is equal to marginal cost—that is, where MR = MC.

Why do perfectly competitive firms sell their products only at the market price?

Why do perfectly competitive firms sell their products only at the market price? Just the opposite occurs when existing firms are earning losses. Some of the existing firms leave the industry, reducing supply, resulting in higher prices and bringing profits up to normal levels.

How is total revenue found in a perfectly competitive firm?

A firm’s total revenue is found by multiplying its output by the price at which it sells that output. For a perfectly competitive firm, total revenue ( TR) is the market price ( P) times the quantity the firm produces ( Q ), or The relationship between market price and the firm’s total revenue curve is a crucial one.

What makes a perfectly competitive firm perfectly competitive?

A perfectly competitive firm’s total revenue curve rises at a constant rate (it is an upward sloping straight line). That is because the marginal revenue is equal to the price and does not change.

How to find the profit maximizing quantity in a perfectly competitive market?

An alternative way to find the profit maximizing quantity is to look at a firm’s total cost and total revenue. A perfectly competitive firm’s total revenue curve rises at a constant rate (it is an upward sloping straight line). That is because the marginal revenue is equal to the price and does not change.

How are marginal costs determined in a perfectly competitive firm?

Marginal Revenues and Marginal Costs at the Raspberry Farm: Individual Farmer. For a perfectly competitive firm, the marginal revenue (MR) curve is a horizontal straight line because it is equal to the price of the good, which is determined by the market, shown in Figure 8.4.