Douglas Fairbanks, Marie Dressler and Charlie Chaplin campaign for war effort. Chaplin dressed as the Tramp to advertise

The transcript discusses the significant role of public support in financing the war effort through the purchase of Liberty Bonds. Nearly half of the American population contributed, raising $21 billion, which accounted for approximately 65% of the total war cost.

What percentage of the total cost of the war was covered by Liberty Bonds?

What was the total cost of the war mentioned in relation to Liberty Bonds?