Akash Uni-Safe in Chennai, India, makes Terminator fire extinguishers. It needs replacement equipment to form the neck at the top of each extinguisher during production. Select between two metal-constricting systems. Use the corporate MARR of 15% per year with

(a) present worth analysis, and

(b) future worth analysis.

Machine D Machine E First cost, $ 62,000 77,000 Annual operating cost, $ per year 15,000 21,000 Salvage value, $ 8,000 10,000 Life, years 4 6