<?php $array = [ 'Nov 18, 2011' => [ 'C' => [ 'T' => 49783.531672, 'X' => 25013.184 ], 'S' => [ 'T' => 32908.863528 ], 'I' => [ 'T' => 44561.52 ] ], 'Nov 22, 2011' => [ 'C' => [ 'T' => -5168.944696 ], 'S' => [ 'T' => -3823.890504 ] ] ]; var_export( array_map( fn($set) => array_sum(array_map(array_sum(...), $set)), $array ) );
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