Hi,
To provide you a confirmed cost and time for this project we need to review, first, the e-commerce template design and second, complete information about the custom work you need to apply on that template.
Please let me know.
We have prior work experience in Magento framework with latest version Community Edition. You can see from our profile we are widely experienced, certified and trustworthy company with over 10 years of professional experience creating successful web applications. We have a near perfect project completion ratio and please check our past work reviews for references.
I look forward to hear from you.
Regards.