AFM- CBE – spreadsheet formulas

Hello,
I would like to know if is necessary to write formulas we use in the spreadsheet – in a sense that we rewrite them from the formula sheet just for marker to be able to see what formula we use.? I would usually done this but as the is time pressure ( and messy to type them in the cells) i would not like to miss other points if this is not necessary. but I am afraid that marker will not be able to recognise formulas that I used ( especially if i have by mistake/in a rush inputted wrong figure). Does the marker looks in the cell figures that are inputted (that are linked to the formula)?
I do not want to lose time on re-typing formula (but if it is important for marker to understand then i must especially it he does not looks at the cell to see inputs and formula with figures).

Thank you in advance on your advice and guidelines

KR
Mihaela