Does anyone has an idea of price of online singing classes in Kolkata or West Bengal?

Hello, I don’t stay in Kolkata or West Bengal, but want to learn Rabindra sangeet, Nazrul sangeet and Indian classical. I have contacted a singing classes and they asked me to pay 5000 per month for 4 classes, i.e. 1250 per class. Does anyone know what is the normal fees for signing classes in Kolkata or West Bengal? As that will help me to counter this fees. Thanks