The loss formula coefficient matrix for a two-plant system is given by

\(B = \left[ {\begin{array}{*{20}{c}} {0.001}&{ - 0.0001}\\ { - 0.0001}&{0.0013} \end{array}} \right]M{W^{ - 1}}\)

The economic schedule for a certain load is given as

P₁ = 150 MW and P₂ = 275 MW.

Penalty factor of plant 1 is _______.