数据列表循环求和

<span class="price">￥<em>1.80</em></span>&nbsp;<span>白色</span>
<span class="price">￥<em>1.50</em></span>&nbsp;<span>白色</span>
<span class="price">￥<em>8.80</em></span>&nbsp;<span>白色</span>
<div class="totalPrice ">总价：<em></em></div>

<script>
var sum = 0;
$(".price em").each(function(e, el) {
    sum += $(this).text();
});
$(".totalPrice em").text("￥" + sum +"元")
</script>