Great question. In 1964, when the Beattles came to the US, a new Home was only $16,500. A first class stamp was just 4 cents. You could fill up a standard tank for around $6.00 because Gas was only 31 cent a gallon! Eggs were 57 cent a dozen with a gallon a milk going for around 50 cent a gallon.
A loaf of bread cost 21 cents. Gas cost 30 cents a gallon. Going to the movies cost $1.25. A stamp cost 5 cents for a letter. These are how much things cost in 1964. You can find more information here: http://www.thepeoplehistory.com/1964.html