The difference between the revenue and cost is known as _____________

The correct option is Profit.

To understand why this is the correct answer, we can look at the fundamental definitions of the terms involved in business and economics:

1. Revenue: This is the total amount of money a business brings in from the sale of its goods or services before any expenses are deducted.

2. Cost (or Total Cost): This represents all the expenses incurred by a business to produce and sell its goods or services, including inputs, labor, rent, and materials.

3. Profit: This is the financial gain obtained when the revenue generated from a business activity exceeds the expenses, costs, and taxes needed to sustain the activity. The mathematical relationship is expressed as:
$$\text{Profit}=\text{Total Revenue}-\text{Total Cost}$$
Therefore, the difference between revenue and cost is known as profit.

Let's briefly see why the other options are incorrect:
• Cost of Production: This refers only to the total cost incurred by a business to produce a product, which is already one of the components being subtracted (the cost itself), not the difference.
• Input Cost: This is the cost of the direct inputs (like raw materials and labor) used in production, representing only a subset of the total cost.
• Marginal Cost: This is the additional cost incurred by producing one more unit of a good or service, rather than the overall difference between total revenue and total cost.