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(D) Your co running a semiconductor pr of 10 years. System 2 costs $75,000 and h

ID: 2787700 • Letter: #

Question

(D) Your co running a semiconductor pr of 10 years. System 2 costs $75,000 and has a useful life of 5 years. mpany is choosing between two types of high voltage power supplies for ocess. System 1 costs $125,000 and has a useful life You need to run your production line for 10 years. Use the annual worth (AW) method of calculation and the repeatability assumption to determine which investment has the lower cost. Note: you will need to buy System 2 twice in the 8-year time period. You MARR 15% Answer Box:

Explanation / Answer

System 1

Initial cost = 125000

Life = 10 years

Hence Annual worth of capital expenditure = 125000*(A/P,15%,10)

As per compound interest tables, we find the A/P 15%,10 to be 0.1993

Annual worth = 125000*0.1993 = $24,912

System 2

Initial cost = 75000

Life = 5 years

Hence we will buy system 2 twice, one in time 0, other at the end of time 5

First we compute the total present value of the investment which is

PW =75000+ 75000*(P/F, 15%,5)

PW = 75000+ 75000*0.4972

= 112290

Annual worth = PW * (A/P,15%,10)

= 112290* 0.1993

= $22,379.40

Since the annual cost of System 2 is lower than that of system 1, the company should buy system 2.