I have files in my root folder. jobs.php, contact.php. 
I want to be able to use .htaccess to remove the .php extension and force a trailing slash /. So that, www.domain.com/jobs/ and www.domain.com/contact/ goes to their respective pages.
Also, I want jobs.domain.com to point to www.domain.com/jobs/
<IfModule mod_rewrite.c>
    Options +SymLinksIfOwnerMatch
    RewriteEngine On
    RewriteBase /
    RewriteRule ^(rosquillos)/$ $1 [L,R=301,NC]
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME}\.php -f
    RewriteRule ^(.*)$ $1.php
</IfModule>
This is what I've got so far, and as much as I try. I can't seem to get it to work.
Any help would be awesome.
EDIT:
I would like to rephrase my question. The existing code removes the .php extensions for me, what I really only need right now is an additional rule that points the subdomain to the correct file: ie. jobs.domain.com points to jobs.php. I can live without the trailing slash.
 
    