What is $10,000 from 1968 costs today? How can I find this information?

Example, a computer costs $10,000 in 1968 and I need to find out what $10,000 in 1968 would be in 2009 to be able to compair how much prices have changed and what $10,000 was to see who could afford these prices in 1968?

Ask older relatives such as grandparents or even some parents could tell you.