It would be nice to have the possibility of using own template for the exported data, as some data may be obtained from own functions.
Something like this:
            columns: [
                {
                    field: "ProductName",
                    title: "Product Name",
                    aggregates: ["count"],
                    footerTemplate: "Total Count: #=count#",
                    groupFooterTemplate: "Count: #=count#"
                },
                {
                    field: "UnitPrice",
                    title: "Unit Price",
                    template: '<div style="text-align: right; font-weight: bold;">#= kendo.toString(UnitPrice, "n2") #</div>',
                    exportTemplate: '#= kendo.toString(UnitPrice, "n4") #',
                    aggregates: ["sum"]
                }
            ]