The objective is to maximize the following function, where TotalRevenue is a linear function of ExtractedPerYear, and TotalCost is a linear function of IsOpen:
TotalRevenue
ExtractedPerYear
TotalCost
IsOpen
![\[ \Variable{TotalProfit} = \Variable{TotalRevenue} - \Variable{TotalCost} \]](images/ormpex_ex70007.png){kind=small}