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Dexcon Technologies, Inc., is evaluating two alternatives to produce its new pla

ID: 1138784 • Letter: D

Question

Dexcon Technologies, Inc., is evaluating two alternatives to produce its new plastic filament with tribological (i.e., low friction) properties for creating custom bearings for 3-D printers. The estimates associated with each alternative are shown below. Using a MARR of 15% per year, which alternative has the lower present worth? DDM $-240,000 -30,000 $2,000 2 years LS $-480,000 $-15,000 $23,000 4 years Method rst t Cost M&O Cost, per Year alvage Value fe The present worth for the DDM method is $ -507115 The present worth for the LS method is $365,28 The DDM method is selected.

Explanation / Answer

For DDM method, we use 2 cycles because LCM is 4 and we need to repeat DDM for 2 more years.

Present worth of DDM method in 2 years = -240,000 – 30,000(P/A, 15%, 2) + 2,000(P/F, 15%, 2)

= -240,000 – 30,000*1.625709 + 2,000*0.756144

= -$287,258.98

Present worth of DDM method = -$287,258.98 -$287,258.98(P/F, 15%, 2)

= -$287,258.98 - $287,258.98*0.756144

= -$504,468.13

Present worth of LS method = -480,000 – 15,000(P/A, 15%, 4) + 23,000(P/F, 15%, 4)

= -480,000 – 15,000*2.854978 + 23,000*0.571753

= -$509,674.35

Since DDM method has a cheaper cost we select DDM

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