Answer:
Market value of Common Stock
Number of stock 6 million
Market price per share $50
Market value of Common Stock $300 million
Weights for various sources
Source Market % of Total Value
Debt 100 23.81% [100/420*100]
Preferred 20 4.76% [20/420*100]
Common 300 71.43% [300/420*100]
Total 420 100%