Round Robin here combines all combos of 2 and 3 team parlays using these four teams:
Pittsburgh -110
Washington -153
St. Louis -119
Detroit -235
$100 unit wager on the two team parlays is $600 to win ~ $1140 (indicates max risk and reward)
$100 unit wager on the three team parlays is $400 to win ~$1565 (indicates max risk and reward)
Then a straight $100 four team parlay is $100 to win $728