ACCESS formula problems

[Leadparsons]

Hi All,

I have and excel formula that i'm trying to convert to access. In excel I have two date columns and the formula will always enters the later of the two dates. If there is a date missing in either it will not display a date. the formula im using is: =IF(K160="","",IF(L160="","",MAX(K160,L160)))

How do I convert this to access calculated expression ?

 

[Leadparsons]

Is there a way I can add 10 workings days to a date, excel I use =WORKDAY(E7,10)