基于另一列的列的html表行中的值总和

Question

我的html表结构如下

name   |1-2018-count |1-2018-fee   |2-2018-count   |2-2018-fee ..
--------------------------------------------------------------------
xyz    |2            | 200         |3              |50
xyz    |1            | 230         |2              |350
abc    |7            | 800         |1              |50
abc    |2            | 100         |1              |100
abc    |2            | 100         |3              |150 

但是现在我想根据第一列显示计数和费用的总和

name   |1-2018-count | 1-2018-fee  |2-2018-count   |2-2018-fee ..
--------------------------------------------------------------------
**xyz  |3            | 430         |5              |400**
xyz    |2            | 200         |3              |50
xyz    |1            | 230         |2              |350
**abc  |9            | 1000        |5              |300**
abc    |6            | 800         |1              |50
abc    |2            | 100         |1              |100
abc    |1            | 100         |3              |150 

我不知道该怎么做。
请任何建议。 我从php生成html，然后ajax请求获得响应。

public function buildHtmlTablemonthly($sql){
     $table = "";
        $table .= "<table border='1' id='reportTable'><thead><tr>";
        $arr = [];

        foreach ($sql[0] as $key => $value) {


            $table .= "<th class='text-center' style='width:130px '>" . $key . "</th>";
        }
        $table .= "</tr></thead><tbody>";

        foreach ($sql as $a) {


            $table .= "<tr>";
            $i = 0;
            foreach ($a as $key => $value) {
                $colspan = ($i != 0) ? " colspan='1'" : "";
                if ($value == null) {
                    $val = "-";
                } else {                

                        $val = $value;
                    }
                }
                $table .= "<td class='text-left ".$key."' style='width:130px'" . $colspan . ">" . $val . "</td>";
                $i++;
            }
            $table .= "</tr>";
        }

        $table .= "</tbody></table>";

        return $table;
}