Avoid multiple RFC calls for file->BAPI interface

Hello,

I have a requirement that i get a csv file with hundreds of records related to material price changes. I have to call 2 BAPI's, one is to change price and 2nd one is to save the price. I am doing it in this way:

1) Mapped source file structure to 2 BAPI's by changing the occurrence  to 0 to unbounded( Multi mapping concept).

2) changed the occurrence in operation mapping as well.

Now the thing is it is processing each record as one message in PI and making RFC call for every line of record. I would like to avoid multiple RFC calls and multiple messages in PI and would like to see just 2 messages( one per BAPI).

I am just wondering is there any way that we can implement this with out using proxy to call BAPI inside proxy.