When you first log into Cost Recovery, you will see a list of billing periods, including the current billing period and the two previous billing periods. You can also view billing periods further back by using the "Other Billing Period" feature. 
If you choose the current billing period, you can go to "Monthly Charges To Date" to view the charges for this billing period. Other options are disabled until the billing period is over. For details on the "Monthly Charges To Date" report, see that section further down on this page.
Reviewing Charges
Most likely, you will more often be going to the billing period that is over and for which processing of charges has not been completed (March 2011 in the example above). This is where you will go to review charges for your lab or labs.
