Hey,
Please let me know which CSS you want in the cart, like for which functionality, so that I can let you know the exact cost it'd take.
Without elaboration, I cannot let you know the exact cost of it.
I do have 14+ years of experience in PHP, multivendor websites, so it'd be great if you can initiate a chat to discuss about it.
I’d love to chat with my client to see if we’re a good fit for each other, so you can contact me anytime.
I look forward to our chat.
Have a great day!
Best Regards,
Ravi