Union Express has 60 tons of cargo that need to be ship

    Union Express has 60 tons of cargo that need to be shipped from Boston to Dallas.
    The shipping capacities on each of the routes Union Express planes fly each night is shown in the following table:
    Nightly Flight Segments Capacity (in tons)
    Boston to Baltimore 30
    Boston to Pittsburgh 25
    Boston to Cincinnati 35
    Baltimore to Atlanta 10
    Baltimore to Cincinnati 5
    Pittsburgh to Atlanta 15
    Pittsburgh to Chicago 20
    Cincinnati to Chicago 15
    Cincinnati to Memphis 5
    Atlanta to Memphis 25
    Atlanta to Dallas 10
    Chicago to Memphis 15
    Chicago to Dallas 15
    Memphis to Dallas 30
    Memphis to Chicago 15
    Will Union Express be able to move all 60 tons from Boston to Dallas in one night?
    Draw a network flow model for this problem
    Create a spreadsheet model for the problem and solve it.
    What is the maximum flow for this network?
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