Calculate Total Qty of items table of Sales Invoice

@mdwala Hi

for (var i = 0; i < cur_frm.get_field(“YOUR_CHILD_TABLE_FIELD”).grid.grid_rows.length; i++) {
total_qty += cur_frm.get_field(“YOUR_CHILD_TABLE_FIELD”).grid.grid_rows[i].doc.field_under_child_table;
}