The manager of canned food processing plant must decide between two different labeling Machine A will have a first cost of $42,000 and annual operating cost of $28,000 and cost of $17,000 and a service life of 4 years Machine B will cost $51,000 to buy and will have an a annual operating cost of $17,000 during its 4 year life. At an interest rate of 10% per year Which should be selected on basis of a present worth analysis? Select machine B at $-140, 888 Select machine A at $-130, 757 Select machine B at $-100, 788 Select machine A at $-129, 700