Squid cache size

[Cristian Stoica]

Anyone can recommend me proper sizes for cache disc and mem?
>From the docs I find out only that I need 5M of memory for each gigabyte
of cache.
The configuration is a PII/300MHz with 64M of RAM and 2 IDE HDD of about 4
GB each.  I currently serve 10 PC but I'd like to know like how much space
is suitable for each additional PC.
Thnaks,
C.