要素テーブルの最後の行は、合計に使用されない列を合計します。

<el-table ref="dragTable" border @header-dragend="headerDragend" :max-height="tableHeight" stripe :data="list"
            :cell-style="$style.cellStyle" :header-cell-style="$style.rowClass" show-summary  :summary-method="getSummaries">
            <el-table-column label="序号" type="index" width="55" />
            <el-table-column prop="houseName" label="仓库名称" v-if="whId == 0" align="center">
            </el-table-column>
            <el-table-column v-for="item in confirmHead" :key="item.label" :label="item.label" :prop="item.prop"
              :width="item.width" align="center" show-overflow-tooltip>
              <template slot-scope="scope">
                <span v-if="item.storageMode">
                  <span>{
    
    {
    
     whAStyleData[scope.row.storageMode] }}</span>
                </span>
                <span v-else>{
    
    {
    
     scope.row[item.prop] }}</span>
              </template>
            </el-table-column>
            <template slot="empty">
              <img src="../../assets/img/empty.png" alt="" srcset="" style="height: calc(100vh - 430px)" />
              <h4>暂无数据~</h4>
            </template>
          </el-table>

  const noSummariesList = [
 "storageMode"
];
  getSummaries(param) {
    
    
      const {
    
     columns, data } = param;
      const sums = [];
      columns.forEach((column, index) => {
    
    
        if (index === 0) {
    
    
          sums[index] = "合计";
          return;
        }
        //去除不用合计得列
        if (noSummariesList.includes(column.property)) {
    
    
          sums[index] = "";
          return;
        }
        const values = data.map((item) => Number(item[column.property]));
        if (!values.every((value) => isNaN(value))) {
    
    
          sums[index] = values
            .reduce((prev, curr) => {
    
    
              const value = Number(curr);
              if (!isNaN(value)) {
    
    
                return prev + curr;
              } else {
    
    
                return prev;
              }
            }, 0)
            .toFixed(2);
        } else {
    
    
          sums[index] = "";
        }
      });
      return sums;
    },