Is there a bug in the BRRRR calculator ??? Help needed

[Naor Biringer]

Hello Ya'll

calling all Investors, I am missing some expenses in the BRRRR calculator in the acquisition phase  :

I cannot find where does the calculator takes in consideration the interest paid to the HML in the 6 months period to refinance
https://www.biggerpockets.com/...

In the calculator sample attached I inserted 20% down on the HML for 6 months hold 
both "Total project cost " and "Total Cash Needed At Purchase" do not include the 6 months interest rate paid for the HML...

I am probably missing out something, please enlighten me !

Thank you !!!