Amazon is considering two robofs to improve materials-handling capacity. Robot x has a first cost of $76,000 an annuar M&0 cost of $31,000 and $37,000 saluage value, and it will improue revenues by $967000 per year. Robof y has a first cost of $146,000, an annual M&O cost of $28,000 and $47,000 salvage value, and it. will increase revenues by $127,000 per year. The companiés MArR is 16% per year, and if uses a 3 -year study period for economic ROR and calculafe the incremental the, and identify the robot the manager should serect. The incremental ROR is: