Samples based on SKU Size for different materials in same plan

Hello Experts,

We have a requirement to create variable number of samples per lot based on lot qty. I have set up the sample drawing procedure and sampling scheme based on the qty and assigned to the inspection plan.

But the problem is that there are several materials assigned to the plan. Since the materials assigned to the inspection plan have different SKU size hence, for some materials the BUoM is same as the qty specified in the Sampling scheme. But for some materials that have different SKU size, it doesnt work.

Thanks

Sahil