function copypaste() {
    var ss = SpreadsheetApp.getActiveSpreadsheet();
    var sheet1 = ss.getSheetByName("FMGXfers");
    var sheet2 = ss.getSheetByName("FMGInventory");
    var numRows = sheet1.getRange('R1').getDisplayValue();

    var index = 3
    var sourceCell = 'T'+index;
    var sourceRef = 'U'+index;
    var targetCell = sheet1.getRange(sourceRef).getDisplayValue();
    var sourceValue = sheet1.getRange(sourceCell).getValues();

    for (var i=1; i<numRows; i++) {
      sheet2.getRange(targetCell).setValues(sourceValue);
      var index = index++;
      var sourceCell = 'T'+index;
      var sourceRef = 'U'+index;
    }
    }