Complex sentence: The average price of a Royal Futura 800 was roughly $125 (U.S.) in 1960; this is $1000 in 2015 inflation-adjusted dollars (as per the Bureau of Labor statistics Consumer Price Index calculator).
Split into simpler sentences: The average price of a Royal Futura 800 was roughly $125 (U.S.) in 1960. This is $1000 in 2015 inflation-adjusted dollars (as per the Bureau of Labor statistics Consumer Price Index calculator).