Hi Rosie,
Welcome to Reckon You can in fact use both and it will split the salary amount into the 2 rows depending on how the hours are split i.e. 32/8, 20/20, etc.
But often the use of the hourly rate is easiest.
But it doesn't reduce the hours - you do need to do this manually.
Kind regards,
Sally McIntosh
sally@samsolutions.com.au