Black & Scholes Option Pricing Formula

when using the Black & Scholes Option Pricing Formula provided by Zerodha, the value of premium differs from 10 to 20RS…this is huge

in the interest box, I have entered 91 day T-bills: 3.2294%
and in the volatility box, I have entered IV from the options chain of the respected strike price

am I doing something wrong over here???

in which scale do we get delta value
0 to 1 OR 0 to 100 ???

I’m not sure but Try with 6% interest rates.

And delta value is either 0 to 1 or 0 to 100. Both are same. In general, it is stated as 30 delta. Usually people don’t refer to it as 0.30 delta. Or 0.50 delta.