Refreshing a cell in sheets

Question

I have this script:

  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheetByName(sheetName);
  var orig = sheet.getRange(row,col).getFormula(); 
  var temp = orig.replace("=", "?");
  sheet.getRange(row,col).setFormula(temp); 
  SpreadsheetApp.flush();
  sheet.getRange(row,col).setFormula(orig); 
}

It refreshes a cell. The sheet and cell that it refreshes is determined by:

function onEdit(e){
  forceEval("Investments", 29, 61)
}

Right now it only refreshes column 61 (BI) row 29. I would like to make it so that it refreshes all cells from 29 down in column 61 (BI). Thanks for any help.