I need help understanding the real estate calculator results

[Katherine Thorndike]

I just plugged in the numbers to a deal I am working on for a rental.  The following results that I don't understand are:

Proforma Cap Rate   6.05 %

Cash on Cash ROI 6.24 %

Purchase Cap Rate   9.04%

What are the acceptable results for purchasing a rental property and what do these terms mean?

thank you

Katherine