math
posted by steven .
A computer costs $799. To add memory it costs $25 for 8 megabytes. How much memory can you add if you have at most $1,000 to spend.

http://www.jiskha.com/display.cgi?id=1299036874
You can add 8 * 8 = 64 megabytes. 
Steven, when you multiple post, you have the obligation of checking the answer of EACH post before reposting.
See answer also at:
http://www.jiskha.com/display.cgi?id=1299037066