Final answer:
The investment banker's gain for the firm commitment offering can be calculated by subtracting the offering price and spread from the selling price. Therefore, the investment banker's gain is $3.30 per share.
Step-by-step explanation:
The investment banker's gain or loss can be calculated by taking into account the offering price, the spread, and the price at which the stock is sold to the public. In this case, the offering price is $52.00 and the spread is $0.70 per share. The stock is actually sold to the public at $56.00.
To calculate the gain or loss, we need to subtract the offering price and the spread from the selling price:
Gain or Loss = (Selling Price - Offering Price) - Spread
Gain or Loss = ($56.00 - $52.00) - $0.70
Gain or Loss = $4.00 - $0.70
= $3.30
Therefore, the investment banker's gain is $3.30 per share.