SKU auto populate

http://www.dubsalongtherockies.com/wp

This is site for a car show. Once i fix my breadcrumb issue. I would like the produce SKU to have the final breadcrumb as part of it. Meaning if i click add to cart from the Audi/ B6 A4/ S4 child category, i would like the SKU to be “DATR2013-car-B6 A4/ S4”

I am new to WP and WooCommerce, so any detailed direction would be great!

http://wordpress.org/extend/plugins/woocommerce/