Incorrect results with different joins

Hi Experts,

The joining between header tables to item tables so confuse to me.

therefore, I have done 2 scenarios and tested the results.

1)   VBAK ---VBELN(1:N)---> VBAP       ----- (VBLEN -VGBEL)(N:M) --> LIPS    output :  order quantity = 1742310(VBAP)  weight =82620445.848 (VBAK)

2)    VBAK --VBLEN(1:N) ---->VBAP      ----- (VBLEN--VGBEL)(N:M) -->LIPS      output :  order Qunatity  = 1639961(VBAP) weight =81457827.308(VBAK)

                                                                 (POSNR-VGPOS)(N:M)

the results too confused more,please suggest and guide the linking approach to get achieve the correct results in HANA  modelling.

Thanks.

Br,

Edukondalu