So, the “cash you put in” should be the net of the purchase price plus closing costs, less loan proceeds. If the loan proceeds exceed the purchase price + closing costs, then you’ll show a “cash out” situation.
This topic is actually discussed in detail here:
Net Cash Flow report not placing Sale Proceeds under Purchase, Sale, & Refinance
This help article also explains best practices for this situation:
Track Purchases, Sales, and Refinances