Please find explanation for those invoices as below.
Units under invoice IDKMT-150801 and IDKMT-150802 are combined in three containers.
Total units for both invoice are 100 units, and there are 5 racks using RC-02.
Actually, since the units are combined and mixed, RC-02 is used 1 racks under IDKMT-150801,
and 4 racks of RC-02 is used under IDKMT-150802.
If we revise as your request, there will be total 6 racks of RC-02.