Is it possible to create a Contact Form that will insert one of the form fields into the email sent?

Example: The form subject line = Request for Product Information {#PRODUCT_INFO}

The field on the form would be named 'PRODUCT INFO' and the field value would be appended to the subject line.

The subject line setting seems static, but it would be helpful to make it dynamic by inserting a field value.

This helps with two things:

1) The emails will not stack up into a single thread so they don't get lost in GMail

2) The subject line is more descriptive and helpful

Here is the current contact form that I use:

https://matthewsohn.com/contact.php

The "Subject" drop-down is emailed in the body of the message but is not included in the subject of the email.

Any ideas and help would be greatly appreciated!

Matthew