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Read the following problem: You order some groceries online and buy 5 things: Yellow Corn Tortillas...

Read the following problem:

You order some groceries online and buy 5 things:

  1. Yellow Corn Tortillas $3.32
  2. Cheddar Cheese $5.89
  3. Avocados $4.41
  4. Cilantro $0.99
  5. Jalapeno pepper $0.39

The website calculates the price and it is displayed as the "Subtotal".

The website charges 11% sales tax and it is displayed as the "Sales tax".

The overall price is calculated and it is displayed as the "Total price".

Based on the following HTML:

<table>
<caption>Details</caption>
<thead>
<tr><th>Item</th><th>Price</th></tr>
</thead>
<tbody>
<tr><td>Yellow Corn Tortillas</td><td id="price1">3.32</td></tr>
<tr><td>Cheddar Cheese</td><td id="price2">5.89</td></tr>
<tr><td>Avocados</td><td id="price3">4.41</td></tr>
<tr><td>Cilantro</td><td id="price4">0.99</td></tr>
<tr><td>Jalapeno pepper</td><td id="price5">0.39</td></tr>
</tbody>
<table>

<table>
<caption>Totals</caption>
<tbody>
<tr><td>Subtotal</td><td id="subtotal"></td></tr>
<tr><td>Sales tax</td><td id="salestax"></td></tr>
<tr><td>Total price</td><td id="total"></td></tr>
</tbody>
<table>
<p></p>

Write a JavaScript function to read the grocery item prices from the above HTML, calculate the Subtotal, Tax, and Total price, and then output the results back into the HTML.

Yes, write some JavaScript for this question!

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Homework Answers

Answer #1

Please find the code and sample outputs

<!DOCTYPE html>
<html>
<head>
</head>

<body>
<table>
<caption>Details</caption>
<thead>
<tr><th>Item</th><th>Price</th></tr>
</thead>
<tbody>
<tr><td>Yellow Corn Tortillas</td><td id="price1">3</td></tr>
<tr><td>Cheddar Cheese</td><td class="price"id="price2">2</td></tr>
<tr><td>Avocados</td><td class="price"id="price3">4</td></tr>
<tr><td>Cilantro</td><td class="price"id="price4">1</td></tr>
<tr><td>Jalapeno pepper</td><td class="price"id="price5">90</td></tr>
</tbody>
<table>

<table>
<caption onclick="sumTable()">Totals</caption>
<tbody>
<tr><td>Subtotal</td><td id="subtotal"></td></tr>
<tr><td>Sales tax</td><td id="salestax"></td></tr>
<tr><td>Total price</td><td id="total"></td></tr>
</tbody>
<table>
<p></p>


<script type="text/javascript">
  
   function sumTable() {
      
       var a = document.getElementById("price1").innerHTML;
       var b = document.getElementById("price2").innerHTML;
       var c = document.getElementById("price3").innerHTML;
       var d = document.getElementById("price4").innerHTML;
       var e = document.getElementById("price5").innerHTML;

       var SubTotal = parseFloat(a) + parseFloat(b) + parseFloat(c) + parseFloat(d) + parseFloat(e);
       console.log(SubTotal);
       var salesTax = parseFloat(SubTotal) * parseFloat(.11);
       console.log(salesTax)
       var Total = SubTotal + salesTax;
       console.log(Total);

       document.getElementById("subtotal").innerHTML = SubTotal;
       document.getElementById("salestax").innerHTML = salesTax;
       document.getElementById("total").innerHTML = Total;

  
   }

</script>

</body>


</html>

Please comment for any further clarifications.

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