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[
                                 {
...
                                   'total_rate' => 250,
                                 }, 
                  ]

         [
                                 {
...
                                 }, 
   
                  ]

my @sorted = 
        sort { (exists $a->{vtype_ug}) ? -1 : 0} 
        sort { $a->{total_rate} <=> $b->{total_rate} }