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 13% per year, which alternative has the lower present worth? Method DDM LS First Cost $-140,000 $-320,000 M&O Cost, per Year $-50,000 $-25,000 Salvage Value $10,000 $23,000 Life 2 years 4 years The present worth for the DDM method is $ . The present worth for the LS method is $ .