What that total number 1st prize ($) that have United States country score more lower than 271 and in year 1964 winner Bobby Mitchell?
Year Winner Country Score To par 1st prize ( $ )
Cleveland Open
12919860
real text text real text real
2-12919860-2
Winners
Winners
1972 David Graham Australia 278 −6 30,000
1971 Bobby Mitchell United States 262 −22 30,000
1970 Bruce Devlin Australia 268 −12 30,000
1969 Charles Coody United States 271 −9 22,000
1968 Dave Stockton United States 276 −8 22,000
1967 Gardner Dickinson United States 271 −9 20,700
1966 R. H. Sikes United States 268 −16 20,000
1965 Dan Sikes United States 272 −12 25,000
1964 Tony Lema United States 270 −14 20,000
1963 Arnold Palmer United States 273 −11 22,000
SELECT COUNT 1st prize ( $ ) FROM table WHERE Country = united states AND Score < 271 AND Year > 1964 AND Winner = bobby mitchell
united states 271 1964 bobby mitchell