<?php
$array = Array
(
	"0" => Array
	(
		"qty_of_leads_by_levels" => Array
		(
			"0" => "6054",
			"1" => "454",
			"2" => "113",
			"3" => "85",
			"4" => "42",
			"5" => "21",
			"6" => "5",
			"7" => "1",
			"8" => "1",
		),

		"avg_conv_cof_arry" => Array
		(
			"0" => "0.08",
			"1" => "0.1",
			"2" => "0.34",
			"3" => "0.25",
			"4" => "0.28",
			"5" => "0.15",
			"6" => "0.16",
			"7" => "0.49",
			"8" => "0.52",
		)
	,
		"avg_deal_size"     => "54545",
		"total_bgt"         => "143763",
	)
,
	"1" => Array
	(
		"qty_of_leads_by_levels" => Array
		(
			"0" => "11393",
			"1" => "8144",
			"2" => "6490",
			"3" => "4868",
			"4" => "2434",
			"5" => "1217",
			"6" => "305",
			"7" => "76",
			"8" => "57",
		),

		"avg_conv_cof_arry" => Array
		(
			"0" => "0.41",
			"1" => "0.42",
			"2" => "0.68",
			"3" => "0.5",
			"4" => "0.55",
			"5" => "0.3",
			"6" => "0.31",
			"7" => "0.98",
			"8" => "1.01",
		),

		"avg_deal_size" => "54545",
		"total_bgt"     => "297490245",
	),
	"2" => Array
	(
		"qty_of_leads_by_levels" => Array
		(
			"0" => "366",
			"1" => "366",
			"2" => "366",
			"3" => "366",
			"4" => "366",
			"5" => "184",
			"6" => "46",
			"7" => "11",
			"8" => "9",
		)
	,
		"avg_conv_cof_arry"      => Array
		(
			"0" => "1",
			"1" => "1",
			"2" => "1",
			"3" => "1",
			"4" => "0.5",
			"5" => "0.25",
			"6" => "0.25",
			"7" => "0.75",
			"8" => "0.75",
		)
	,
		"avg_deal_size"          => "54545",
		"total_bgt"              => "1981167",
	)
);


$final = array();

array_walk_recursive( $array, function ( $item, $key ) use ( &$final ) {
	$final[ $key ] = isset( $final[ $key ] ) ? $item + $final[ $key ] : $item;
} );
unset( $final['avg_deal_size'], $final['total_bgt'] );

echo '<pre>';print_r($final);echo '</pre>';