In Report's i need to sort the data based on SLA Number by selection supplier in trend report

[Swathi KS]

I have written some script but because of SLA number field was string field it was not sorting the way i want

if (input.selectedSupplier == 'all') {

        // Sort alphabetically by supplier_name when 'all' is selected

        gr.orderBy('slt_id.master_contract_id.sup_id.supplier');

        gr.orderBy('met_num');

    } else {

        // Sort by met_num when a specific supplier is selected

        gr.addQuery('Supplier',input.selectedSupplier);

        gr.orderBy('met_num');

    }

here is the script it was sorting but it was string field so i need to sort only in number like if SLA number data contains CSL - 1, KM - 11 , CSL - 2

Sort should be : CSL - 1, CSL - 2, KM - 11

Please help me resolve this issue