Can This be done in Standard SAP PP? Packing into smaller Bags

HI Experts,

i have a scenario. Not sure Standard PP can handle it or not.

We buy fertilizer in KG. Goods issues using Bag. it is around 50Kg per bag.

We would like to repack it into smaller bag. says 2kg per bags.

if we use PP order and BOM. after the packing process. we realize the final quantity of bags we have is 30bags instead of 25bags. what shall we do to update SAP on the variance? will the cost is by 50kg. or it will round using 60kg?

Thanks
Regards