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If the business uses a room, a sewing machine, and 8 hours of a laborer's time with 6 yards of cloth to make a shirt, then the cost of labor and cloth increases if two shirts are produced, and those are the variable costs. The facility and equipment are fixed costs, incurred regardless of whether even one shirt is made.
Variable costs (VC) are the costs of the variable input, labor, or wL, where w is the wage rate and L is the amount of labor employed. Thus, VC = wL. Marginal cost (MC) is the change in total cost per unit change in output or ∆C/∆Q. In the short run, production can be varied only by changing the variable input.
In economics, average variable cost (AVC) is a firm's variable costs (VC; labour, electricity, etc.) divided by the quantity of output produced (Q): = Average variable cost plus average fixed cost equals average total cost (ATC): A V C + A F C = A T C . {\displaystyle AVC+AFC=ATC.}
Variable cost: Variable costs are the costs paid to the variable input. Inputs include labor, capital, materials, power and land and buildings. Variable inputs are inputs whose use vary with output. Conventionally the variable input is assumed to be labor. [5] Total variable cost (TVC) is the same as variable costs. [5] Fixed cost (TFC) are the ...
Average variable cost (AVC/SRAVC) (which is a short-run concept) is the variable cost (typically labor cost) per unit of output: SRAVC = wL / Q where w is the wage rate, L is the quantity of labor used, and Q is the quantity of output produced. The SRAVC curve plots the short-run average variable cost against the level of output and is ...
The cost of materials to produce goods is a variable cost. The more (or fewer) widgets a company produces, the more (or fewer) materials the company will need to purchase in order to be able to ...
Fixed costs are costs incurred by things like rent, building space, machines, etc. Variable costs change as the production quantity changes, and are often associated with labor or materials. The derivative of fixed cost is zero, and this term drops out of the marginal cost equation: that is, marginal cost does not depend on fixed costs.
The marginal cost can also be calculated by finding the derivative of total cost or variable cost. Either of these derivatives work because the total cost includes variable cost and fixed cost, but fixed cost is a constant with a derivative of 0. The total cost of producing a specific level of output is the cost of all the factors of production.