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html <!DOCTYPE html> <html> <head> <title>PayPal Calculator</title> <script> function calculateTotal() { var quantity = parseInt(document.getElementById("quantity").value); var price = parseFloat(document.getElementById("price").value); var taxRate = parseFloat(document.getElementById("taxRate").value); var subtotal = quantity * price; var taxAmount = (subtotal * taxRate) / 100; var total = subtotal + taxAmount; document.getElementById("subtotal").textContent = subtotal.toFixed(2); document.getElementById("taxAmount").textContent = taxAmount.toFixed(2); document.getElementById("total").textContent = total.toFixed(2); } </script> </head> <body> <h1>PayPal Calculator</h1> <label for="quantity">Quantity: </label> <input type="number" id="quantity" value="0"><br><br> <label for="price">Price per item: $</label> <input type="number" step="0.01" id="price" value="0"><br><br> <label for="taxRate">Tax Rate (%): </label> <input type="number" step="0.01" id="taxRate" value="0"><br><br> <button onclick="calculateTotal()">Calculate</button><br><br> <label for="subtotal">Subtotal: $</label> <span id="subtotal">0.00</span><br><br> <label for="taxAmount">Tax Amount: $</label> <span id="taxAmount">0.00</span><br><br> <label for="total">Total: $</label> <span id="total">0.00</span><br><br> </body> </html> ```