? $shoesPrice = 49; //鞋子單價(jià)

? ? $shoesNum = 1; //鞋子數(shù)量

$shoesMoney = $shoesPrice*$shoesNum;

$shirtPrice = 99; //襯衣單價(jià)

$shirtNum = 2; //襯衣數(shù)量

$shirtMoney = $shirtPrice * $shirtNum;

$orderMoney = $shoesMoney + $shirtMoney;

echo $orderMoney ;