Vue 表单合计行 显示固定字段

getSummaries(param) {
      const { columns, data } = param;
      const sums = [];
      columns.forEach((column, index) => {
        if (index === 1) {
          sums[index] = '合计';
          return;
        }
        const values = data.map(item => Number(item[column.property]));
        if (column.property == "字段名") {
          sums[index] = values.reduce((prev, curr) => {
            const value = Number(curr);
            if (!isNaN(value)) {
              return prev + curr;
            } else {
              return prev;
            }
          }, 0);
          sums[index] += ' 元';
        } 
      });

      return sums;
    }