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Issue with data type price

I have a uneditable grid(read only) which has a column for price.The grid is not display the value zero when u declare the data type as grid.Please let me know how to display the value.Thanks in advance.

If you need not to show 0 for empty cells , you can 
a) declare different type for them in XML
   <row id="123"><cell type="ro"></cell>
b) redefine logic of price excell
eXcell_price.prototype.setValue=function(val){
 if (isNaN(parseFloat(val))){
       this.setCValue(val, val);
 }
 var color = "green";

 if (val < 0)
  color="red";

 this.setCValue("<span>$</span><span style='padding-right:2px;color:"+color+";'>"+val+"</span>", val);
}