+ * @example
+ * Ext.create('Ext.data.Store', {
+ * storeId:'sampleStore',
+ * fields:[
+ * { name: 'symbol', type: 'string' },
+ * { name: 'price', type: 'number' },
+ * { name: 'change', type: 'number' },
+ * { name: 'volume', type: 'number' },
+ * ],
+ * data:[
+ * { symbol: "msft", price: 25.76, change: 2.43, volume: 61606325 },
+ * { symbol: "goog", price: 525.73, change: 0.81, volume: 3053782 },
+ * { symbol: "apple", price: 342.41, change: 1.35, volume: 24484858 },
+ * { symbol: "sencha", price: 142.08, change: 8.85, volume: 5556351 }
+ * ]
+ * });
+ *
+ * Ext.create('Ext.grid.Panel', {
+ * title: 'Number Column Demo',
+ * store: Ext.data.StoreManager.lookup('sampleStore'),
+ * columns: [
+ * { text: 'Symbol', dataIndex: 'symbol', flex: 1 },
+ * { text: 'Current Price', dataIndex: 'price', renderer: Ext.util.Format.usMoney },
+ * { text: 'Change', dataIndex: 'change', xtype: 'numbercolumn', format:'0.00' },
+ * { text: 'Volume', dataIndex: 'volume', xtype: 'numbercolumn', format:'0,000' }
+ * ],
+ * height: 200,
+ * width: 400,
+ * renderTo: Ext.getBody()
+ * });