E-commerce Website Development with CMS

I am looking to get an e-commerce website made. The website should be built with a Content Management System (CMS) to allow easy updates and product additions.

Key Requirements:
- Development of a user-friendly and responsive e-commerce website
- Integration of a reliable CMS (WordPress with WooCommerce, Shopify, or Magento)
- Design and implementation of secure payment gateways
- SEO optimization and mobile-friendliness

Ideal Skills and Experience:
- Prior experience in e-commerce website development
- Proficiency in CMS, particularly WordPress with WooCommerce, Shopify, or Magento
- Strong understanding of SEO and mobile optimization
- Knowledge of secure payment gateway integration
- Excellent design and UX skills

Please provide your minimum charge for this project.