Moving Data from a form on a Page.php to WordPress's database

I’ve been pounding my head against the wall on this one and I can’t seem to find a solution. The concept is easy enough I just don’t quite understand how to do it. Here’s what I’m trying to do. I have a <form> embedded within one the pages of one of my WordPress web-sites. Here’s what the code looks like:

[Code moderated as per the Forum Rules. Please use the pastebin]

If you also want to look at the page you can see it here: greenZpages

Now here’s what I’m trying to do. I have 8 fields that I need to be able to capture the data and migrate it over to a special table that I created within the WordPress database. I’ve already created the table and assigned all of the necessary attributes that each field requires. I just need to figure out how to take the data once it’s inputed within the <form> on the lead-capture-form page and inject that data into a specified table within the word press database.

So I need it to work like this

(<form>) ———-> (<Custom_Table> in <WordPress_DB>)

| value 01 | A | ———-> | field 01 | A |
| value 02 | B | ———-> | field 02 | B |
| value 03 | C | ———-> | field 03 | C |
| value 04 | D | ———-> | field 04 | D |
| value 05 | E | ———-> | field 05 | E |
| value 06 | F | ———-> | field 06 | F |
| value 07 | G | ———-> | field 07 | G |
| value 08 | H | ———-> | field 08 | H |

From there I can manipulate the data however I choose. I just can’t figure out how to get it over there. I’m obviously new at this so please understand that. Any help would surely be appreciated. Thanks!