Because a competitive firm's marginal revenue is equal to the market price, the competitive firm's demand curve, which is just a horizontal line at the market price, is also the firm's marginal revenue curve.ecause a competitive firm's marginal revenue is equal to the market price, the competitive firm's demand curve, which is just a horizontal line at the market price, is also the firm's marginal revenue curve.
Quick Answer. Natural gas is measured in cubic feet, cubic meters, British thermal units or joules, while gasoline is measured in gallons, British thermal units, joules or metric tons. The unit used to measure gas is dependent upon the situation in which the gas is being used.
How gross margin is used in sales. Retailers can measure their profit by using two basic methods, markup and margin, both of which give a description of the gross profit. The markup expresses profit as a percentage of the retailer's cost for the product. The margin expresses profit as a percentage of the retailer's sales price for the product. These two methods give different percentages as results, but both percentages are valid descriptions of the retailer's profit.