A dairy operator is investigating purchasing new robotic equipment that entirely automates the milking process. This investment would cost $1 million but would save $100k per year for the 20-year life of the equipment. Explain to me the process for how this operator should think about whether to make this investment or not. You do not need to actually calculate any numbers, just explain to the operator in detail about how to think about this problem using concepts such as MARR, discount rate, opportunity cost, and/or net present value.