Fixed Assets Projected Depreciation Report

I am compiling a Budget on (ver 3.10A) and want to know by FA Posting Group and and by month what my depreciation charge will be. I use the above standard report : what does the first period amount represent - it seems that it is depreciation up to the first date but it shows as being dated for the first date of the second period -(the period I want to know the depreciation for. Also while it gives me the report by month (if I set the number of days to 30) it does not give me by FA Posting Group and month at the same time. Could someone suggest how I could get the projected depreciation for the second period by FA posting Group and Month. thank You