The value entered into cell YB would be 60. Option 2
The Northwest Corner Rule is a method used in transportation problems to find an initial feasible solution by starting at the northwest corner of the tableau and allocating shipments until one of the row or column capacities is exhausted.
The cell YB (at the intersection of row 2 and column 1) indicates the quantity to be allocated.
The northwest corner is at cell XY (row 1 and column 1).
Following the Northwest Corner Rule, you start allocating the maximum possible quantity in each cell. Begin by allocating 60 units from cell XY (row 1, column 1) to cell YB (row 2, column 1) since it is the maximum that can be sent without exceeding the capacity in either row 1 or column 1.
The complete question:
In using the Northwest Corner Rule to find an initial solution, what value will be entered into the cell
YB?
A DestinationB Cap. C
1 3 1
X 80 2
2 5 Y
60 3 1
4 Z 80
Req. 50 100
70