WordPress expert needed to add promo codes to a WordPress / WooCommerce site

I have two small jobs: First: I need a small WooCommerce task completed on my existing WordPress website. Create several WooCommerce coupon codes. Each coupon gives a percentage discount that I must be able to set and change myself from the WordPress admin panel itself; i.e... (Budget: $30 - $250 CAD, Jobs: HTML, PHP, Website Development, Website Management, WooCommerce, WordPress, WordPress Design, WordPress Multilingual, WordPress Plugin)