在larave admin如何把两个主键关联的数据插入到导出的数据

//导出
<?php
class FinanceExporter2 extends ExcelExporter implements WithMapping
{ 
    protected $fileName = '订单明细.xlsx';
    protected $columns = [
        'JDorderCode'   => '订单号',
        'orderproductid' => '小票号',
        'JDSKU' => '产品编码',
        'ProductName' => '产品名',
        'PhotoNum' => '照片数量',
        'username' => '客户名',
        'phone' => '手机',
        'Adress' => '地址',
        'HandleName' => '渠道',
        'OrderTime' => '下单时间',
        'Tb_ShippingOrder.ShippingNo' => '物流单号',
    ];

    public function map($Finance) : array
    {
        return [
            $Finance->JDorderCode,
            $Finance->orderproductid,
            $Finance->JDSKU,
            $Finance->ProductName,
            $Finance->PhotoNum,
            $Finance->username,
            $Finance->phone,
            $Finance->Adress,
            $Finance->HandleName,
            $Finance->OrderTime，
            data_get($Finance, 'Tb_ShippingOrder.ShippingNo'),
        ];
    }
}

$price = PartnerPrice::where('sku', $sku)->where('handlename', $handlename)->value('price');
$totalprice = (float)PartnerPrice::where('sku', $sku)->where('handlename', $handlename)->value('price')*(int)$PhotoNum;

3. 您期望得到的结果？

如何把$price和$totalprice插入到导出的表格里面