Report on CQ revenue amount breaking up into 2 for every month

Hi there,

I am suppose to create a matrix report that shows the pipeline size for CQ revenue amount by close date (i.e. breaking up the every month into 2 and hence 6 periods in the quarter). Unfortuntely the closed date is grouped by : day, month, CQ, etc but not 2 breaks ina month.

Please can any one help me