Sort order numeric with xml binded datasource

Hi,

i have an grid with XML binded Datasource. One Column has numeric Data but the grid use alphabetic sort order. Example 1, 100, 2, 200, 3, 300 etc..
Can i use an numeric sort order (1,2,3,100,200,300) ?. How?

The Sourcecode:
$("#grid").kendoGrid({
sortable: true,
selectable: "single",
change: onChange,
            dataSource: {
serverPaging: false,
                serverSorting: false,
                
transport: {
read: {
                        url: "../GetSachbearbeiterListe",
                        dataType: "xml",
                        data: {
                            Suchbegriff: ""
                        }
                    }
                },
schema: {
                    type: "xml",
id: "f07001",
                    data: "/response/update/tabelle/satz",
total: "/response/update/anzahl/text()",
                    model: {
                        fields: {
                            f07001:  { field: "f07001/text()", type: "number" },
                            f07002: "f07002/text()",
f07110: "f07110/text()", 
f07013: { field: "f07013/text()", type: "text" }
                        }
                    }
                }
            },
scrollable: {
                virtual: false
            },
            columns: [{
field: "f07001",
title: "Sb-Nr.",
width: 20
}, {
field: "f07002",
title: "Name",
width: 100
}, {
title: "Status",
width: 30,
template: "#= gContentSachbearbeiter.formatStatusColumn(f07110) #"
}, {
field: "f07013",
width: 70,
title: "Aussendarstellung"
}
]
        });
}