I need a script that gets the output of softwareupdate -al on each machine (the list of available updates) and reports how many updates are needed in total by all the machines on the network, and the results to 4 different recipients.

i.e.
total patches required = 12

hostname1 =4 patch(es)
hostname2=3 patch(es)
hostname3=4 patch(es)
hostname4=1 patch(es)