i'v crystal report have two types of payment mood 
1's is Cash 
2's is Visa
how get sum of each payment mood in report footer ?

```
ACT P.Mood Amount
987 Cash   300
988 Cash   200
989 Visa   200
252 Cash   210 
253 Visa   310
475 Cash   108
522 Visa   404

```

i wanna get Sum For cash and for Visa