计算平均等待时间扭转一个过程的时间

Question

您好我无法确切地了解等待和周转时间是如何计算的，我正在为准备考试而学习这一点而且我确实有一篇过去的论文，但是标记方案没有解释这些值来自何处这是一个问题：

    #leftColumn {
      width: 500px;
      float: left;
    }
    .placeholderText {
      font: bold 12px/30px Georgia, serif;
    }
    body {
      padding-left: 45px;
    }
    #annualEnergyConsumption {
      font: bold 25px arial, sans-serif;
      color: #00ff00;
    }
    #annualCostOperation {
      font: bold 40px arial, sans-serif;
      color: #00ff00;
    }
    .dailyButInline {
      display: inline;
    }
    /* mouse over link */

    button:hover {
      background-color: #00ff00;
    }
    /* selected link */

    button:active {
      background-color: #00ff00;
    }

答案仅显示计算，而不是我理解的最佳解释：

    <h2>Annual Energy Consumption and Cost Calculator</h2>

    <form id="costForm">
      <div id="leftColumn">
        <div>	<span class="placeholderText">Choose Category</span>
          </br>	<span>
    <select id="ddl">
    <option value="">Select a Category</option>
    <option value="refrigerators">Refrigerators</option>
    <option value="dishWasher">DishWasher</option>
    </select>
    	</span>

          </br>
          </br>
        </div>
        <div>	<span class="placeholderText">Select a Product</span>
          </br>	<span>
    	<select id="products">
    			<option selected>--------------------------</option>
    	</select>
    	</span>

          </br>
          </br>
        </div>
        <div>	<span class="placeholderText">Wattage</span>
          </br>	<span id="wattage">Select a Category and product to view its wattage</span>

          </br>
          </br>
        </div>
        <div id="buttonBoundary">
          <div class="placeholderText">Estimated Daily Use</div>
          <div class="dailyButInline">
            <button type="button" id="h1" onclick="estimatedDailyUse(this)">Not a Lot 1 hour per day</button>
          </div>
          <div class="dailyButInline">
            <button type="button" id="h3" onclick="estimatedDailyUse(this)">Average</br>3 hour per day</button>
          </div>
          <div class="dailyButInline">
            <button type="button" id="h6" onclick="estimatedDailyUse(this)">A Lot</br>6 hour per day</button>
          </div>
          <div class="dailyButInline">
            <button type="button" id="h24" onclick="estimatedDailyUse(this)">Always On</br>24 hours per day</button>
          </div>
          </br>
          </br>
        </div>
        <div>	<span class="placeholderText">Daily Energy Consumption</span>
          </br>
          <div id="daily">0.268 kWh</div>
          </br>
        </div>
        <div>	<span class="placeholderText">Approximate Days used per year</span>
          </br>
          <div id="daysUsed">
            <input type="number" id="hour" maxlength="2" min="1">
            </br>
            <input type="checkbox" id="allYear" />
            <label for="allYear">All year</label>
          </div>
          </br>
        </div>
        <div>	<span class="placeholderText">Annual Energy Consumption</span>
          </br>
          <div id="annualEnergyConsumption">547.5 kWh</div>
          </br>
        </div>
      </div>
      <div id="right">
        <div>	<span class="placeholderText">Enter your Utility Rate per Kw/h</span>
          </br>	<span><input type="number" id="utilityRate" /></span>

          </br>
          </br>
        </div>
        <div>	<span class="placeholderText"><button id="annualCost" onclick="annualCost()">Annual Cost to Operate</button></span>
          </br><span id="annualCostOperation" /></span>
        </div>
      </div>
    </form>

这是正确的还是有更好的方法来计算这个任何帮助非常感谢