====== AvgBal ======
This is the average balance function.  It returns the daily average balance of a GL account for a given month (or span of months).

**AvgBal(AcctNum, AvgBalDate, //PosNeg//, //StartDate//)**
==== Example Usage ====
  * **=AvgBal("1010-000", "7/31/2009")**  Returns the daily average balance for account 1010-000 during the month of July, 2009.
  * **=AvgBal("1010-000", "6/30/2009", ,"1/1/2009")**  Returns the daily average balance for account 1010-000 during the first two quarters of 2009.  
    * Note the extra comma between the AvgBalDate and the StartDate.  That must be included because the PosNeg parameter is not specified.
  * **=AvgBal("1010-000", "3/17/2009", "C", "10/22/2008")**  Returns 'Debit Balance' because the daily average balance for account 1010-000 for the last quarter of 2008 and first quarter of 2009 is a debit balance and the "C" in our formula told Excel to only display the balance if it was a credit.  See below for more information about the PosNeg parameter.
  
==== Required Parameters ====
{{section>parameters#acctnum}}
{{section>parameters#avgbaldate}}
==== Optional Parameters ====
{{section>parameters#posneg}}
{{section>parameters#startdate}}