<form>
  <table>
    <tr>
      <th>Quantity</th>
      <th>Product</th>
      <th>Description</th>
      <th>Add</th>
      <th>Total</th>
    </tr>
    <tr>
      <td><input type="number" id="quantity" name="quantity"></td>
      <td>
        <select id="product" name="product">
          <option value="Product 1">Product 1</option>
          <option value="Product 2">Product 2</option>
          <option value="Product 3">Product 3</option>
        </select>
      </td>
      <td><textarea id="description" name="description"></textarea></td>
      <td><button type="button" onclick="addProduct()">Add</button></td>
      <td><input type="number" id="total" name="total" readonly></td>
    </tr>
  </table>
  <div id="product-list"></div>
</form>

<script>
  let productList = [];
  let total = 0;

  function addProduct() {
    let quantity = document.getElementById('quantity').value;
    let product = document.getElementById('product').value;
    let description = document.getElementById('description').value;
    let price = 10; // default price

    let productTotal = quantity * price;
    total += productTotal;

    productList.push({
      quantity: quantity,
      product: product,
      description: description,
      total: productTotal
    });

    document.getElementById('total').value = total;
    updateProductList();
  }

  function updateProductList() {
    let productListHtml = '';
    for (let i = 0; i < productList.length; i++) {
      productListHtml += `
        <p>Quantity: ${productList[i].quantity}</p>
        <p>Product: ${productList[i].product}</p>
        <p>Description: ${productList[i].description}</p>
        <p>Total: ${productList[i].total}</p>
        <hr>
      `;
    }
    document.getElementById('product-list').innerHTML = productListHtml;
  }
</script>

<form>
  <table>
    <tr>
      <th>Quantity</th>
      <th>Product</th>
      <th>Description</th>
      <th>Add</th>
      <th>Total</th>
    </tr>
    <tr>
      <td><input type="number" id="quantity" name="quantity"></td>
      <td>
        <select id="product" name="product">
          <option value="Product 1">Product 1</option>
          <option value="Product 2">Product 2</option>
          <option value="Product 3">Product 3</option>
        </select>
      </td>
      <td><textarea id="description" name="description"></textarea></td>
      <td><button type="button" onclick="addProduct()">Add</button></td>
      <td><input type="number" id="total" name="total" readonly></td>
    </tr>
  </table>
  <div id="product-list"></div>
</form>

<script>
  let productList = [];
  let total = 0;

  function addProduct() {
    let quantity = document.getElementById('quantity').value;
    let product = document.getElementById('product').value;
    let description = document.getElementById('description').value;
    let price = 10; // default price

    let productTotal = quantity * price;
    total += productTotal;

    productList.push({
      quantity: quantity,
      product: product,
      description: description,
      total: productTotal
    });

    document.getElementById('total').value = total;
    updateProductList();
  }

  function updateProductList() {
    let productListHtml = '';
    for (let i = 0; i < productList.length; i++) {
      productListHtml += `
        <p>Quantity: ${productList[i].quantity}</p>
        <p>Product: ${productList[i].product}</p>
        <p>Description: ${productList[i].description}</p>
        <p>Total: ${productList[i].total}</p>
        <hr>
      `;
    }
    document.getElementById('product-list').innerHTML = productListHtml;
  }
</script>