Darrell, a simple (both in configuration and in details) solution with web interface would be
darkstat.
Its two minutes to configure and get going. Instead of giving the netmask in the config as 192.168.1.0/24, try 192.168.1.0/255.255.255.0. The former gave me trouble when I tried, not sure why.
And if you are looking for something without web interface, I like to use
etherape a lot. This gives the real time traffic usage, with from-to ip/host and protocol/port etceteras.