Answer:
The correct answer for option (a) is shown below, and for option (b) is $2,325,000
Explanation:
According to the scenario, the computation of the given data are as follows:
(a). 
Jan 29   Cash  A/c Dr. $1,725,000            (75,000 × $23)
               To, Common stock A/c. $750,000    ( 75,000 × $10)
              To Share in excess of par value A/c $975,000   ( 75,000 × $23-$10)
May 31  Cash  A/c Dr. $600,000    ( 100,000 × $6)
             To, Preferred stock  A/c $400,000  ( 100,000 × $4)
            To, Preferred stock in excess of par value  A/c $200,000 ( 100,000 × $6 - $4)
(b). Total amount invested = $1,725,000 + $600,000
= $2,325,000