Sentence:  For the Smith-Hughes , George-Barden , and National Defense Act of 1958 , the cumulative total of Federal expenditures in 42 years was only about $ 740 <WSD>million</WSD> . 
Meaning of the word marked with <WSD> tags:  (in Roman numerals, M written with a macron over it) denoting a quantity consisting of 1,000,000 items or units