มีโจทย์ที่ปวดหัวมากๆๆ ครับมาให้ช่วยคิด ผมจะทำไงดีครับ

$unit_fire = 7;
$p1 = 10;  $p2 = 20; $p3 = 55;
$sump1 = $p1*$unit_fire;
$sump2 = $p2*$unit_fire;
$sump3 = $p3*$unit_fire;
$sumMax = $sum1+$sum2+$sum3;
//ก็เรียกใช้ตามนั้น

<?php
$array=array(1=>5,2=>15,3=>35,4=>85);

$people=count($array);
$share=array();

krsort($array);

for($x=$people;$x>=1;$x--){
	if($x!=1){
		$unit=($array[$x]-$array[$x-1])/$x;
		$share[$x]=$unit;
	}else{
		$share[$x]=$array[$x];
	}
}


$pay=array(0);

for($x=$people;$x>=1;$x--){
	$pay[]=5*array_sum($share);
	array_pop($share);
}

unset($pay[0]);

echo "<pre>";
print_r($pay);
echo "</pre>";

Array
(
    [1] => 145.83333333333
    [2] => 120.83333333333
    [3] => 95.833333333333
    [4] => 62.5
)

?>