I must admit I'm useless at figures and whilst it seems like it should be an easy sum I can't get my head around how to calculate it 
I'm looking at my options for when I return to work after maternity leave and trying to figure out if what I would like to do will be cost affective. Before my maternity I worked 35 hours per week and when I go back to work I would like to reduce my hours to 30.
I'm trying to figure out roughly what my monthly income would be, is there a formula I can use or can I PM someone with the figures, as unfortunately as I've said above, I'm just struggling to work it out 
If anyone could help me I would really appreciate it 