formatItem: (s, e) => {
      var col = s.columns[e.col];
      if(e.panel.cellType === wijmo.grid.CellType.Cell) // 서식을 적용할 셀의 CellType을 확인하세요.
      {
        if (col.binding == 'value'){
          var val = parseFloat(s.getCellData(e.row, e.col));
          var usl = parseFloat(s.getCellData(e.row, e.col-2));
          var lsl = parseFloat(s.getCellData(e.row, e.col-1));
          var html = '<div style="background-color: red;">{val}</div>';
          html = html.replace('{val}', val);
          if (lsl > val || usl <= val) // fail
          {
            e.cell.innerHTML = html;
          }
        }
      }
    }