Synthetic cash (EQ-number futures)

Hi,

WHat is the general formula for synthetic cash because in various exercises I found it different:

number of futures to create a synthetic cash position = [(b_target- b_portf) / (b_futures)] * [(Vp (1+Rf)^n)/ (Pf*multiplier)]

Are you taking into account also dividend yield?

thanks a lot!!

where b_target of course is 0