Running Balance

Experts,

I have an attached query (Q_RunningBalance).  
I have a dilemma.
I need the Q_RunningBalance to show, as the beginning balance, the previous ending balance.  

for example,
initial balance = 100
expense Nov = 20
Ending Balance Nov = 80
Begining Balance Dec = 80

I need to use the Ending Balance as the Begining Balance.
Much like how your checking account will show you a balance after each expense/deposit.  

How could the query (Q_RunningBalance) be modified to use the Ending Balance as the beginning balance for each Type (JBIC, NEXI, Uncovered)?

thank you
Database1Rev--1-.accdb