issue regarding collect statement

HI,

     collect statement is used to compress unique data sets, and when it comes to amount fields it sums up the values,but  i have to bifurcate records in internal table  (i mean to  separate records ) while  using collect statement  , whenever two different amount values are present for same field.

am i supposed to use different data types or different statement for the filed so that it should not collect .                                                                                                                                                          

please check below screen shot for exact explanation.

Example :

code             work     unit      Quantity   Rate

200021      shuttering   m2     100           150

200021      shuttering   m2     100           120

200022      PCC          m3      90            200

200022      PCC          m3      90            200

since last two records contained same value it has been compressed , whereas  first two records contains same values except  rate value, so i needed to show output in the below manner ,how it can  be acheived.

Final output should be in this manner ..

200021      shuttering   m2     100           150

200021      shuttering   m2     100           120

200022      PCC          m3      180           400

Thanks & Regards

J.Prakash Rao