What must be added to variable cost to give total cost?

To obtain the total cost of producing a certain quantity of output, you need to add the fixed cost to the variable cost. Fixed costs are the costs that do not change with the level of output, such as rent, insurance, or salaries. Variable costs, on the other hand, are the costs that vary with the level of output, such as the cost of raw materials, labor, or electricity. Thus, adding the fixed cost to the variable cost will give you the total cost of producing a specific level of output. Therefore, the correct option to choose is "fixed cost" to get the total cost.