Real Options

Hello Sir, I knw its last minute but Iv got a little bit confused here I hv done my ravion though.
In real call options ( expand or delay) when we arrive at the value of the options how do we then arrive at the overall project value do we subtract like

C (Value of Call) – (NPV of the project) = overall value

And in case of put options:

P (value of Put) + (NPV of the project) = overall value of the project

Am I right sir or do I need to go back to my ravion ?

Thanks