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เศรษฐศาสตร์ มหาวิทยาลัย

วิชา PRE380

2. A chemical company is considering options for eliminating harmless chemical sludge from the following 2 options. (1) Prepare the site for landfilling in the factory. This option requires the initial investment for purchasing the essential equipment 130,000 Baht. Each year there will also be a cost of landfill operation 95,000 baht per year. At the end of its service life of 3 years, the equipment used within the landfill site will have a salvage value of 20,000 baht. (2) Hire a chemical sludge removal contractor to remove sludge. The contract term must be 6 years. The cost of contract to be paid to the contractor are 110,000 Baht a year in year 1-2; 115,000 Baht in year 3; 120,000 Baht in year 4; 125,000 Baht in year 5; and 130,000 Baht in year 6. a) (13 marks) If the company finances the money for this project by borrowing from a bank in which the bank charges interest on loans at the rate of 3.86% per 6 months, compounded every month. Which option should this chemical company choose? b) (5 marks) The company executives believe that the option of establishing a landfilling site within the factory seems to be a more sustainable alternative for the company. If the selection in question a) above did not select the landfilling site option, please suggest how much the initial investment for purchasing the equipment should cost so that the landfill option would be selected (assume the same salvage value of the equipment)?

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iter: / will take you he waiter and the couple and answer the questions - food. Listen to another conversation between - came into the restaurant, They are about to order ) 81 Following the conversation In Activlty 6.17, ปnit 6 Aet6.18 (he couple, Vidgo 2ส table for 2 people. Bradi No, thank6, Ca) We order food to g0, please? Fese follow me, Waiter: You want to have your food to go? Not for here? Natale: Yes, We do, Water: OK. I will get you a meทน. Please Walter: What wouldyou |ike for tonight, slr? have a Seat. Natalle: May I get Cashew Nut Chicken? Brad: Can have beef Panang, please? 10) Brad: Yes, please make เt for 2 Waiter: Would you ltke steamed rice als0? People. 12 Waiter: Alright, the food will be rght | with you in a few minutes. Natalie: Thank5 a lot. Well walt here. 5 Does the couple want to have dinner at the restaurant? 2 Did Natalie order the food first? 3. Did Brad order pork Panang? คำว่า To go หรือ Tokeaway 4 Is Natalie's order Cashew Nut Chicken? Did the waiter tell the couple that the food will take long? หรือ Takeout มีความหมายเหมือน กันคือ "การซื้ออาหารแล้วนากลับไป รับประทานที่บ้านหรือรับประทาน จ้างนอกร้าน

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ของคำว่า Air Conditioning Sgelerm ซึ่งก็คือระบบปรับอากา Natalie and the front-desk officer about tie complaint in her room. Then write short answers to the questions 1.isten fo the Conversafin betweern Front desk offce Hellol Front desk s speaking. Natalie:lt's Nata from theroom rurm NatalieะThe air -the fidge in m เdon't Work. Front-desk officer: t's the front-desk officer here. May 1 help you, maam? Front-desk officer: Ohl My apology, ma'am. Natalie: Can we the room? We CE here. Front-desk officer: Yes, you definitely can, maam. lwill bring youanew key card for your new room in a miทute. Natalieะ OK, We in the room. From the conversation, write short answers to these questions. What room number does Natalie have problems with? 2. What kinds of problems does Natalie have in her room? 3. What does the front-desk manager do to Solve the problems? 0 คำว่า Aircon หรือบางครั้งถูกเรียกอย่างย่อที่สุดว่า A/C เป็นภ 2 คำว่า Fridtge เป็นภาษาพูดของคำว่า Refrigerator (ตู้เย็น) ในการเรียภาษาอังกฤษต้องหลีกเลี่ยงการใช้ภาษาพูดเป็น ค้าว่า กาศร, /C และ Friว0 ถึงควรหล็กเลี่ยงเช่นกัน

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