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Total costs = fixed costs + (unit variable cost × number of units) Total revenue = sales price × number of unit These are linear because of the assumptions of constant costs and prices, and there is no distinction between units produced and units sold, as these are assumed to be equal.
Notice that w (average unit production cost) includes the fixed and variable costs. The square brackets contain the cost of goods sold, wq not cost of good made wx where x = cost of good sold. To show cost of good sold, the opening and closing finished goods stocks need to be included The profit model would then be:
Variable costs are sometimes called unit-level costs as they vary with the number of units produced. Direct labor and overhead are often called conversion cost, [3] while direct material and direct labor are often referred to as prime cost. [3] In marketing, it is necessary to know how costs divide between variable and fixed. This distinction ...
It assumes average variable costs are constant per unit of output, at least in the range of likely quantities of sales. (i.e., linearity). It assumes that the quantity of goods produced is equal to the quantity of goods sold (i.e., there is no change in the quantity of goods held in inventory at the beginning of the period and the quantity of ...
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 ...
First-In First-Out (FIFO) assumes that the items purchased or produced first are sold first. Costs of inventory per unit or item are determined at the time produces or purchased. The oldest cost (i.e., the first in) is then matched against revenue and assigned to cost of goods sold. Last-In First-Out (LIFO) is the reverse of FIFO.
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.
Long-run average cost is the unit cost of producing a certain output when all inputs, even physical capital, are variable.The behavioral assumption is that the firm will choose that combination of inputs that produce the desired quantity at the lowest possible cost.