PHP X-Mailer not sending all fields - php

Question

I am by no means a developer. Self-taught, but can usually wing it enough to make things happen. Working on company website for boss, and having trouble with the form. Regardless of how I try to define the PHP variable, SOME are not sending the input value to the e-mail. I'm sure I'm missing something simple, thank you in advance for your help! This is what's not showing:
Website:
Average Monthly Volume:
Preferred Contact Method:
Here is what I have so far:
HTML FORM:
<div class="product-screens2">
<div style="padding:200px">
<div class="form">
<div id="sendmessage">Your message has been sent. Thank you!</div>
<div id="errormessage">Please retry.</div>
<form action="form-email" method="post" role="form" class="contactForm">
<div class="form-row">
<div class="form-group col-lg-6">
<input type="text" name="name" class="form-control" id="name" placeholder="Your Name" data-rule="minlen:4" data-msg="Please enter at least 4 chars" />
<div class="validation"></div>
</div>
<div class="form-group col-lg-6">
<input type="email" class="form-control" name="email" id="email" placeholder="Your Email" data-rule="email" data-msg="Please enter a valid email" />
<div class="validation"></div>
</div>
<div class="form-group col-lg-6">
<input type="text" class="form-control" name="subject" id="subject" placeholder="Business Name" />
</div>
<div class="form-group col-lg-6">
<input type="text" name="name" class="form-control" id="business_site" placeholder="Business Website" />
</div>
<div class="form-group col-lg-6">
<input type="text" class="form-control" name="name" id="avgvolume" placeholder="Average Monthly Volume" />
</div>
<div class="form-group col-lg-6">
<input type="text" class="form-control" name="name" id="contactmethod" placeholder="Preferred Contact Method" />
</div>
</div>
<div class="form-group">
<textarea class="form-control" name="message" rows="5" data-rule="required" data-msg="Please write something for us" placeholder="Brief Description of Goods or Services Sold"></textarea>
<div class="validation"></div>
</div>
<div class="text-center"><button type="submit" title="Send Message">SUBMIT</button></div>
</form>
</div></div>
</div>
PHP MAILER SCRIPT
<?php
/***************** Configuration *****************/
// Enter your email, where you want to receive the messages.
$contact_email_to = "Support#XXXXX.com";
// Subject prefix
$contact_subject_prefix = "Message From XXXXX Website: ";
// Name too short error text
$contact_error_name = "Name is too short or empty!";
// Email invalid error text
$contact_error_email = "Please enter a valid email!";
// Subject too short error text
$contact_error_subject = "Subject is too short or empty!";
// Message too short error text
$contact_error_message = "Too short message! Please enter something.";
/********** Do not edit from the below line ***********/
if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {
die('Sorry Request must be Ajax POST');
}
if(isset($_POST)) {
$name = filter_var($_POST["name"], FILTER_SANITIZE_STRING);
$email = filter_var($_POST["email"], FILTER_SANITIZE_EMAIL);
$subject = filter_var($_POST["subject"], FILTER_SANITIZE_STRING);
$message = filter_var($_POST["message"], FILTER_SANITIZE_STRING);
$business_site = $_POST["business_site"];
$avgvolume = $_POST["avgvolume"];
$contactmethod = $_POST["contactmethod"];
if(strlen($name)<4){
die($contact_error_name);
}
if(!filter_var($email, FILTER_VALIDATE_EMAIL)){
die($contact_error_email);
}
if(strlen($message)<3){
die($contact_error_subject);
}
if(strlen($message)<3){
die($contact_error_message);
}
if(!isset($contact_email_from)) {
$contact_email_from = "contactform#" . #preg_replace('/^www\./','', $_SERVER['SERVER_NAME']);
}
$sendemail = mail($contact_email_to, $contact_subject_prefix . $subject,
"Name: $name" . PHP_EOL .
"Reply-To: $email" . PHP_EOL .
"Business: $subject" . PHP_EOL .
"Website: $business_site" . PHP_EOL .
"Average Monthly Volume: $avgvolume" . PHP_EOL .
"Preferred Contact Method: $contactmethod" . PHP_EOL .
"Business Description: $message" . PHP_EOL .
"X-Mailer: PHP/" . phpversion()
);
if( $sendemail ) {
echo 'OK';
} else {
echo 'Could not send mail! Please check your PHP mail configuration.';
}
}
?>