黄瓜3.5元/斤 西红柿2.7元/斤 计算2斤黄瓜3斤西红柿总价

<h1>黄瓜3.5元/斤 西红柿2.7元/斤  计算2斤黄瓜3斤西红柿总价</h1>
<p>本页面提供黄瓜和西红柿的单价，并计算2斤黄瓜3斤西红柿的总价。</p>
<p>黄瓜价格： <span>3.5</span> 元/斤</p>
<p>西红柿价格： <span>2.7</span> 元/斤</p>
<p>2斤黄瓜3斤西红柿的总价： <span id='total'></span> 元</p>
<script>
const cucumber = document.querySelector('span:nth-of-type(1)');
const tomato = document.querySelector('span:nth-of-type(2)');
const total = document.querySelector('span:nth-of-type(3)');
<p>const cucumberPrice = parseFloat(cucumber.innerHTML);
const tomatoPrice = parseFloat(tomato.innerHTML);</p>
<p>const totalCost = 2 * cucumberPrice + 3 * tomatoPrice;</p>
<p>total.innerHTML = totalCost.toFixed(2);
</script></p>