>Cost</code> metric reported by the
<a href="https://marxansolutions.org" class="external-link"><em>Marxan</em> software</a> (Ball <em>et al.</em> 2009).
Specifically, the cost of a solution is defined as the sum of the cost
values, supplied when creating a <code><a href="problem.html">problem()</a></code> object
(e.g., using the <code>cost_column</code> argument),
weighted by the status of each planning unit in the solution.</p>
    </div>
    <div class="section level2">
    <h2 id="solution-format">Solut