explain this

The following is an extract from course of sales data from Comsec for WEZ.

Can anyone explain:

* why most trades are for such small amounts under $13
* what does the "x" mean in the condition column

Time Price Volume Value Condition
03:39:34 PM 0.050 7,870 393.50 x
03:32:32 PM 0.054 1 0.05
03:23:41 PM 0.055 83 4.57
03:14:49 PM 0.055 83 4.57
03:03:22 PM 0.055 251 13.81
02:53:12 PM 0.055 83 4.57

thanks