I have a couple questions about an example from Bill Chen and Jerrod Ankenman's book The Mathematics of Poker. Below is a screenshot of the example (Example 4.3).
My questions are:
If the game is $30-$60, how can the pot be $75? Shouldn't the pot be at least $120 (2x the BB)?
Why should B call if his chance of winning is greater than 30/105? Shouldn't it be 30/135? After A bets $30, if B calls, B is risking $30 to win $105, which implies a 30/135 chance right?