Help with working out a UK income tax calculation

Help with working out a UK income tax calculation

Hello

I would be really grateful for some help.

Using Flow I would like to work out a NET monthly income from a GROSS annual income.

I have a spreadsheet that does this function here...


I want to use flow to write the value in B1 and return the value in C1

Is this possible?  Or any other way of achieving the same result?