MS Outlook Mac to MS Outlook 2010?

I have read many community websites on suggesting how to take my mails from Outlook Mac to MS Outlook. Many says import you OLM file and then a 3rd party software to convert OLM to PST. I have checked many 3rd party software all are paid. 

Some also suggest to drag all the mails to desktop folder and then to MS Outlook 2010. I have got 4 mail accounts configured to Mac Outlook with over 8000 mails saved in 30 folder.  (this is after i have cleaned my mailbox for unwanted mails)

If i can transfer my PST to Mac Outlook without paying a penny, i am sure there has to a be a way to do so for Mac outlook to MS Outlook 2010. 

Please suggest a simple way to shift from Mac Outlook to MS Outlook 2010. 

Regards,

Akar Parekh