Billing Statement Due Date amount Calculation

I just want to sum the amount by his past due state (current, 1to30, 31, 60,etc..).

I work out a solution, but I think there should be a more simplify way. I just create and If on hidden cells that return 0, 30, 60, 90, 91 (this is for over 90 formula =IF(AND($A15<>0,$G$2-$A15>90),91)). Then on the cell of the past due totals use a SUMIF if by the value 30,60,90,91( this is over 90 total =SUMIF(L15:L48,91,$F15:$F48).

Regards,