Summarising a spreadsheet

Morning all,

I am not the best on excel and i am asking for assistance regarding summarising a spreadsheet.

I have attached a small section of a much larger spreadsheet.

On the attached file i have shown what i have and also what i require on the 'april/may' tabs. Basically i have a spreadsheet with 'workload' on(first tab). I essentailly need to show 'workload' in monthly installments (ie issue out a monthly workload rather than an annual workload).

Hope this makes sence, if not please ask and ill try and explain in more detail.

Kind regards