Check my 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 17% per year, which alternative has the lower present worth? Method First Cost M&O Cost, per Year Salvage Value Life DDM $-100,000 S-40.000 $6,000 2 years LS $-500.000 S-25.000 $27,000 4 years The present worth for the DDM method is $ The present worth for the LS method is $ The DDM method is selected