I am having problems with this home work. I understand it is a shortest path problem. I can't seem to set it up correctly. The problem reads
At the beginning of year 1, a new machine must be purchased. The cost of maintaining a machine i years old and the cost of purchasing a machine at the beginning of each year are given in the tables below. There is no trade-in value when a machine is replaced. Your goal is to minimize the Total cost (purchase plus maintenance) of having a machine for five years. Determine the years in which a new machine should be purchased.
Age at the Maintenance Cost
Beg of Yr for Next Yr ($)
Year Purchase Cost
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