"Real Estate by the Numbers" Math question

[Alan Hale]

This is for those of you that read the book (as I'm on my 2nd time through).  Of course anyone can chime in. 

1)  341-343,Chapter 42.  It says "Profit = sales price - purchase price - expenses"  Even on the levered fix-and-flip deal example it gives the full purchase price.  But if you're financing 20% down on $100k (like the book says) isn't your "purchase price" only $20k?  Instead of $200k-$100k-$60 expenses, shouldn't it be $200k-$20k-$60k expenses?? 

2) On the second 'Hone Your Skills' bullet point, I'm getting an answer of $57000, not $63k like the back of the book says. 
$400000-250000=200000. Expenses total up to $93k.  200k-93k = 57k.  So where is the $63k solution coming from? 

It's a great book and I've learned a lot from it.  I'm just hanging up on these. As it says on p.344 "make sure your assumptions are sound..." Thank you to J. Scott and Dave Meyer for writing it.

[Chris Seveney]

@Alan Hale

Can’t answer number 2 but financing has nothing to do with your profit

I’m it doesn’t matter what you buy whether a car, home or pack of toothpicks, your profit is what you paid for it minus your costs/expenses

Where financing does come into play is it is a cost as money is not free - but it’s only what you have paid for that financing.

Hope that makes sense