Robert Oppenheimer was put in charge of putting the pieces together at Los Alamos. After the final bill was tallied, nearly $2 billion had been spent on research and development of the atomic bomb. The Manhattan Project employed over 120,000 Americans.
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The general trend is that it took more and more Livres to equal a US dollar over time from 1643 to 1715.
The value of the Livre has decreased because over time, it takes more and more Livres to equal a U.S. dollar. In 1683, it took only 220 (mmm) to equal a U.S. dollar. In 1992, a single Livre was worth $10.50 U.S. dollars so the Livre was more valuable in 1992 than in 1715.
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