25 J 2 There are three machines in the mechanical engineering lab A, B, and C and need to be evaluated economically. Machine A has a first cost of 54500, an annual operating cost (AC) 5900, a salvage value of $200, and a service life 4 years. Machine B has a first cost of 53500, an annual operating cost (MOC) of $700, a salvage value of $350 and a service life 4 years Machine Chas a first cost of 56000, an annual operating cost (ADC) of $50, a salvage value of 5100, and a service life 3 years. What is the present worth for machine A? The MARRIS 104 per year 19.802 39.222 $12,313 18.071