Answer:
$600 million
Explanation:
On January 1, 2020, the balance of common stock & APIC
Common stock & APIC = Paid-In Capital + Share Capital raised by issuing 50 million shares at $20 per share - Treasury Stock
Here
Paid-In Capital is $500 millions
Issue of 50 million shares at $20
Treasury Stock is 20 million shares at $45 per share
By putting the values, we have:
Common stock & APIC = $500 million + $1000 million - (20 million shares * $45 per share)
Common stock & APIC = $1500 millions - $900 million = $600 million