Financial calculator for NPV

Good day,

Firstly I want to thank you guys for this platform, It has been a true revelation for me as someone who has been studying with a different institution and got a couple of exemptions. This platform has made it easy for me to understand the structure and style of testing adopted by the ACCA.

I wanted to find out whether I will be penalised for using a financial calculator to determine NPVs and IRR in the exam. I understand the examiner is also testing the ability to use discount factor tables but if I use an alternative method, how does that affect my score?

Thanks