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EMBA 512 Modeling Examples Fall, 2016 Monthly Payment Determine the monthly payment required to fully amortize a $425,000 loan with an interest rate of 4.65% and a 30-year term. How does the payment change if the term is 20 years? How does the payment change if the term is 30 years but the interest rate is 5.75%? What must the interest rate be on a 30-year term for the monthly payment to be $2,000? Develop a table that shows the monthly payment for 15 and 30 year terms with interest rates between 3% and 7% in 0.5% increments. Copy Shop Breakeven Analysis You are considering opening a small copy shop. It costs $5,000 to rent a copier for a year. It costs $0.03 per copy to operate the copier. Other fixed costs of running the shop come to $400 per month. The average charge per copy is $0.10. The shop will be open 365 days per year. Each copier rented can make up to 100,000 copies per year. a. For 1-5 copiers rented and daily demands of 500, 1000, 1500, and 2000 copies per day, compute the annual profit for each combination of copiers rented and daily demand. b. If 3 copiers are rented, what daily demand for copies is required to breakeven? Pricing & Demand Estimation A company produces and sells a product. The company wants to determine the price that maximizes its profit from this product. The unit cost of producing and marketing the product is $50. The company will charge at least $50 for the product to ensure that it makes some profit. However, the market for the product is competitive and demand falls sharply when prices are increased. Assume the company has estimated two points on the demand curve for this product. Specifically, suppose the company estimates that demand will be 400 units when price is $70 and 300 units when price is $80. How should the company proceed in determining a price that will maximize profits for this product? Plant Capacity Analysis Assume the demand for the drug Wozac during the current year is 50,000, and demand will grow at 5% per year. If we build a plant that can produce x units of Wozac per year, it will cost us $16x. Each unit of Wozac is sold for $3. Each unit of Wozac produced incurs a variable production cost of $0.20. It costs $0.40 per year to operate a unit of capacity. Determine how large a Wozac plant to build to maximize expected profit over the next ten years. (Hint: forget about plant depreciation. To facilitate the analysis just keep track of demand, capacity, production, revenue, fixed cost, variable cost, operating cost, and profit. Use a data table to help determine the sensitivity of profit to changes in capacity. The capacity with the highest profit will be the “best” decision). Dynamic Pricing A department store has purchased 5,000 swimsuits to be sold during the summer sales season. The season lasts three months and the store manager forecasts that customers buying early in the season are likely to be less price sensitive and those buying later in the season are likely to be more price sensitive. The demand curves in each of the three months are forecast to be as follows: d1 = 2,000 – 10p1, d2 = 2,000 – 20p2, and d3 = 2,000 – 30p3. If the department store is to charge a fixed price over the entire season, what should it be? What is the resulting revenue? If the department store wants dynamic prices that vary by month, what should they be? How does this affect profits relative to charging fixed prices? If each swimsuit costs $40 and the store plans to charge dynamic prices, how many swimsuits should it purchase at the beginning of the season? Capacity Simulation Analysis NuFeel is going to manufacture the drug Wozac. Demand during each of the next ten years for Wozac is thought to be normally distributed with a mean of 50,000 and a standard deviation of 12,000. NuFeel needs to determine how large a plant to build to maximize its expected profit over the next 10 years from selling Wozac. If the company builds a plant that can produce x units of Wozac per year, it will cost $16 for each of those x units (this cost is incurred in the first year only). NuFeel cannot hold Wozac in inventory from one year to the next, so each year’s production will be the smaller of the expected demand in that year or the plant capacity. Each unit of Wozac sells for $3.70. Each unit of Wozac produced incurs a variable production cost of $0.20. It costs $0.40 per year to operate a unit of capacity. a. Among the capacity levels of 40,000, 45,000, 50,000, 55,000, 60,000, 65,000, and 70,000 units per year, which level maximizes expected profit? Use simulation to answer this question. Do not worry about depreciation in this exercise. Replicate the simulation for each capacity alternative 25 times. b. For each capacity level under evaluation, compute the maximum 10-year profit, the minimum 10-year profit, the average 10-year profit, the standard deviation of 10-year profit, and the 95% confidence interval for the expected 10-year profit, based on the 25 replications. What capacity level do you recommend?