alv grid display regarding

hi all,

i have a requirement in which at selection-screen i give date range for a material and if a material has same date in the same month then i sholud get the summarising of the date and i need columns according to the no of dated in particular month it should be dynamical.

example:

if i have a material.

MATNR       200801    20080
    1234      0        12

in the above example 0 is the total of the materials amt on 01.01.2008 and 12 is the total amount on 02.01.2008.

so if any one plz help on this points awarded for solutins.

thanks in advance

anupama