an class="n">curPer</span> <span class="o">=</span> <span class="n">tid</span> <span class="o">-</span> <span class="n">lastTid</span>
                            <span class="n">element</span> <span class="o">=</span> <span class="n">_Element</span><span class="p">(</span><span class="n">tid</span><span class="p">,</span> <span class="n">pair</span><span class="o">.</span><span class="n">quantity</span><span class="p">,</span> <span class="n">remainingUtility</span><span class="p">,</span> <span class="n">