Revenue can be expressed as

Analyze the question: It asks for the meaning of revenue in Economics.

Explain the concept: Revenue is the income a firm receives from selling its goods or services. It is calculated as:

Total Revenue (TR) = Price (P) × Quantity sold (Q)

Revenue is different from profit. Profit is what remains after costs are deducted:

Profit = Total Revenue − Total Cost

Go through the options:

• A. Total profit made after sales: Wrong. Profit is revenue minus costs, so this is not revenue.
• B. Amount of goods produced: Wrong. This is output, not revenue.
• C. Total money realized from sales: Correct. This is exactly the definition of revenue, which is the money a firm earns from selling its products.
• D. Amount spent on purchases: Wrong. This is expenditure or cost.

Tip: Think of "revenue" as "money coming IN from sales" before any costs are removed. If an option mentions deducting costs, it is describing profit. If it mentions spending, it is describing cost. Remember: Revenue = P × Q.