We next add the constraints. Press the Add..." button to add constraints. The dialog box
has three parts for the left hand side, the type of constraint, and the right hand side. Put the
cell references for a constraint in the form, choose the right type, and press Add". Continue
until all constraints are added. On the nal constraint, press OK".
We need to explicitly include nonnegativity constraints.
Helpful Hint: It is possible to include ranges of constraints, as long as they all have the same
type. c1..e1