Unpack and Repack in SAP PP

Hi Experts,

We have a sample scenario which is about to be followed in a Retail industry. So according to that scenario, for example say, a particular store receives 50 kg pack of rice. After receiving it they unpack the 50 kg rice and repack into smaller ten 5 kg packs. So i need to acheive this scenario using workcentre (with activity type assigned to cost center) and production order. The work center may be either machine or labor. So how to acheive this scenario. Kindly share your valuable answers. Thanks in advance..!!

Regards,

Jeffrey