$1\mathrm{.}7.$ 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 $20\%$ per year, which alternative has the lower present worth? $(10$ marks$)$

Table $2$: Present worth comparison

$\backslash$table$[[$Methods$,$DDM$,$LS$],[$First cost$,$ $$,-164,000,-370,000$