hihi..i'm new member and also new to use crystal report 11. Need some help from all member here......appreciate for all your help

PURCHASING REPORT February, 2009
Num Supplier Num receipt value percentage month to date
1 PERSAD 1,089,908 26.32 (jan+feb)
2 ZHOZHO 753,422 18.19 ?
3 PERVIE 603,878 14.58 ?
Total 3,754,869 90.66
Others 386,731 9.34
Grand Total 4,141,600 100.00
This report will appear top 20 record for each month, this oly the sample for few record.
The Question is, how i want to display month to date total for the record?
Let say for example: when i key in february to view the feb report, then month to date field will total up january and february value and show in column, or if i key in march then month to date field will show total up for jan+feb+march)
p/s: each month the top of 20 supplier will different. Maybe this month PERSAD is top 20, but at the following PERSAD will not in the top 20 list.
so, i don't know how to show the montht to date total.
thanks
Edited by angelyin1984 - 12 May 2009 at 12:01am