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A real estate agent is considering changing her cell phone plan. There are three

ID: 2783152 • Letter: A

Question

A real estate agent is considering changing her cell phone plan. There are three plans to choose from, all of which involve a monthly service charge of $20. Plan A has a cost of $.43 a minute for daytime calls and $.18 a minute for evening calls. Plan B has a charge of $.53 a minute for daytime calls and $.15 a minute for evening calls. Plan C has a flat rate of $80 with 250 minutes of calls allowed per month and a charge of $.40 per minute beyond that, day or evening Determine the total charge under each plan for this case: 140 minutes of day calls and 60 minutes of evening calls in a month. (Do not round intermediate calculations. Round your answer to 2 decimal places. Omit the "$" sign in your response.) a. Cost for Plan A Cost for Plan B Cost for Plan C $ 91.00 $103.20 $100.00 If the agent will use the service for daytime calls, over what range of call minutes will each plan be optimal? (Round each answer to the nearest whole number.Include the indifference point itself in each answer.) c. Plan A is optimal from zero to minutes. Plan C is optimal from minutes onward d. Suppose that the agent expects both daytime and evening calls. At what point (i.e., percentage of total call minutes used for daytime calls) would she be indifferent between plans A and B? (Do not round intermediate calculations. Enter your answer as a percentage rounded to 2 decimal places Omit the "%" sign in your response.) Point percent daytime minutes

Explanation / Answer

A) Total charge under Plan A 20 service charge+60.2 daytime+10.8 evening call= 91

Under Plan B Service Charge 20+ 74.2 daytime+9evening time=103.2

Under Plan C Service Charge 20+ 80 Flat= 100

C) Plan A is optimal from zero to 186 min

Plan c is optimal 187.5 min onwards

D) it would be indifferent- 81 min

Part 2

Loan processing

Utilization % is 31.6%

efficiency % is 89.5%

Furnace repair

Utilization % is 30 %

Efficiency % is 90%

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