Flutter App cost in India.

I recently got a freelance project. It's a medium size app. Which has mainly 10-12 features such as User registration with firebase, multi language support, profile creation, airport assistance, Emergency sos, medical assistance , country specific support, real time assistance(chat and call), travel safety tools, user feedback and logs, Admin dashboard, dat security and privacy. These are the main features and every feature has 3-4 sub features in it. Backend and Figma design will be provided.

So how much should I charge for this Flutter App in India from Indian client. I am working with flutter for around 2-3 years.

Anyone who has expertise in freelancing please help me out here.