We are a team of designers and developers with expertise and experience in Photoshop, HTML, CSS, PHP, AJAX, JQuery, XML, Wordpress, Bootstrap, CodeIgniter, Laravel and MySql. We have developed many custom sites and applications of varied extents and complexity, including many e-commerce sites. We have coded and integrated custom CMS in PHP for many of them, enabling easy management of products etc. from a password protected admin interface. We have also integrated Wordpress and Woocommerce for many. We have integrated Paypal for many sites.
I have studied the overview. I am not sure I understand what you mean by "make it calculate for example Silver 5 > Silver 4 = 10, Silver 5 > Silver 1 = 50 for example". Please give complete details - how many pages, flow, functionalities, fields.
Above details will help me to assess scope of work precisely. I will revise / confirm my bid accordingly. Detailed specifications and inputs will also help me to make an informed commitment and deliver as required.
I ensure a very thorough job and also support if you need changes / enhancements in future. I look forward to hearing from you and working on the project.