What are maximizing when marginal revenue and marginal cost?

Why are actual markets said to have high transaction costs?

Every firm's aim is to get more profit and revenue form their existing products.Behid that intention companies have to set high targets and convert their economical indicators.Major reasons behind that are;Profit MaximizationThe monopolist's profit maximizing level of output is found by equating its marginal revenue with its marginal cost, which is the same profit maximizing condition that a perfectly competitive firm uses to determine its equilibrium level of output. Indeed, the condition that marginal revenue equal marginal cost is used to determine the profit maximizing level of output of every firm, regardless of the market structure in which the firm is operating.Total Cost-Total Revenue MethodTo obtain the profit maximizing output quantity, we start by recognizing that profit is equal to total revenue minus total cost. Given a table of costs and revenues at each quantity, we can either compute equations or plot the data directly on a graph. Finding the profit-maximizing output is as simple as finding the output at which profit reaches its maximum.Marginal Cost-Marginal Revenue MethodIf total revenue and total cost figures are difficult to procure, this method may also be used. For each unit sold, marginal profit equals marginal revenue minus marginal cost. Then, if marginal revenue is greater than marginal cost, marginal profit is positive, and if marginal revenue is less than marginal cost, marginal profit is negative. When marginal revenue equals marginal cost, marginal profit is zero.And one major reason behind that isAn economic indicator (or business indicator) is a statistic about the economy. Economic indicators allow analysis of economic performance and predictions of future performance.Economic indicators include various indices, earnings reports, and economic summaries, such as unemployment, housing starts , Consumer Price Index (a measure for inflation), industrial production , bankruptcies, Gross Domestic Product, retail sales , stock market prices, and money supply changes.Economic indicators are primarily studied in a branch of macroeconomics called " business cycles". The leading business cycle dating committee in the United States of America is the National Bureau of Economic Research .The Bureau of Labor Statistics is the principal fact-finding agency for the U.S. government in the field of labor economics and statistics.These are the main reasons that actual markets have high their transaction costs.