Let's work on an example of calculating Marginal Costs. The book describes Marginal Costs as the additional cost incurred when the output is increased by one unit. However, sometimes in the real world information isn't available for increases of single units, rather it is available only for larger increases. So, suppose we have the following information about the costs of a firm: Quantity Total Cost 300 $1700 500 $2500 650 $3250 This means that the total costs for the company would be $2500 if it decided to produce 500 units of output and $3250 if it decided to produce 650. We can still calculate a Marginal Cost of the 650th unit, but it will have to be the Marginal Cost (per unit) of units 501 to 650. Note that we still want to put the Marginal Cost on a per-unit basis. So to do that, we will take the change in costs from increasing the output from 500 to 650 and divide by the change in quantity. Also note that we want to use data for the smallest gap possible. So while we have data for other levels of output, we will use data for the nearest quantity (500) and ignore the others (350) Step one is to calculate the change in total costs.

1. revising for conciseness - eliminating flabby expressions,limiting long lead-ins, and dropping unnecessary fillerstime is money in any business environment. people want information communicated quickly and clearly. to make your writing more concise and understandable, avoid flabby expressions, long lead-ins, and unnecessary fillers. your audience will appreciate your brevity.1. if your writing contains a flabby expression like in view of the fact that, replace it with the word because / although / probably .for each of the following two sentences, choose the best revision.2. i am sending you this letter to inform you that we have experienced an unexpected surprise within our expense sheet, but we are positively certain we will solve it.1) we need to inform you that we have experienced an unexpected surprise with our expense sheet, but we are midway to an end result.2) we have identified a problem with our expense sheet, but we will solve it.3) i am sending you this letter to inform you that we have a problem with our expense sheet, but we are positively certain we have a solution.3. it is the user who should contact the center.1) everyone knows that it is the user who should contact the center.2) the user should contact the center.3) if there is a problem, the user should contact the center.read the following passage, and then answer the question.[1] you scheduled seven conference calls for this morning between 10 and 11 a.m. [2] generally, the company limits the number of conference calls to three per hour. [3] i’m letting you know that in the future, we should be more careful about scheduling.4. which revision limits the long lead-in in sentence 3? 1) in the future, we should be more careful about scheduling.2) i’m letting you know so that in the future we are more careful about scheduling calls.3) so that you know in the future, we should be more careful about scheduling.

At present, the united states has an embargo against north korea because a. the two countries have extremely poor political relations. b. north korea will not adopt a capitalist government. c. north korean products are too difficult to use. d. north korea has an embargo on american products. e. products from north korea are in higher demand than american-made products.

Which of the following is one disadvantage of renting a place to live compared to buying a home? a. tenants have to pay for all repairs to the building. b. the landlord covers the expenses of maintaining the property. c. residents can't alter their living space without permission. d. rent is generally more than monthly mortgage payments.