Final answer:
The par value of the common stock issued by the firm is $4 per share, calculated by dividing the common stock account value by the number of shares issued.
Step-by-step explanation:
The question pertains to the calculation of the par value of common stock issued by a firm.
To find the par value per share, we take the total value in the common stock account and divide it by the number of shares issued.
The firm has $1,720,000 in its common stock account and has issued 430,000 shares.
Thus, the par value per share is calculated as $1,720,000 divided by 430,000 shares, which equals $4 per share.