=SI(AHORA()>(HOY()+B4);1;((HOY()+B4)-AHORA())<=(1/24*0,5))
=SI(AHORA()>(HOY()+B4);1;((HOY()+B4)-AHORA())<=(1/24*1))
=SI(AHORA()>(HOY()+B4);1;((HOY()+B4)-AHORA())<=(1/24*2))