please help, i feel like my answer is correct and cant find my mistake

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 14.00% per year, which aiternative has the lower present worth? (Include a minus sign if necessary.) The present worth for the DDM method is $ The present worth for the LS method is \$ The method is selected