NPV workings

Dear Tutor,

I would like to ask in the NPV calculations for instance the inflated sales do i need to do all the workings separate or can i just put in straight with a formula?

We have for example

Sales-units= 150
Selling price = 4
Sales inflation 4%

For Year 1 i would put straight on the cell

=150*4*1.04^1

Would this be enough ?I see others doing a separate working for the inflated sales and variable costs, and it takes time to write it all down.

Thank you