$\mathit{Maximize} \space \sum_{i = 1}^{I} -s \space c_i \space x_i +
\sum_{j = 1}^{J} m_b l_b \\
\mathit{subject \space to} \\
\sum_{i = 1}^{I} x_i r_{ij} \geq y_j t_j \forall j \in J \\
m_b \leq y_j \forall j \in T(b) \\
\sum_{i = 1}^{I} x_i c_i \leq B$$</p>
<p>Here, \(x_i\) is the <a href="decisions.html">decisions</a> variable (e.g.,
specifying whether planning unit \(i\) has been selected (1) or not
(0)), \(r_{ij}\) is the amount of feature \(j\) in planning
unit \(i\), \(t_j\) is the representation ta