Scale the weights with number of books

Right now, every return label from my company assumes the package weighs 3 lbs total, no matter how many books are included. This is causing major issues with USPS since the actual weight is always off.

For example:

• If I send 1 book, the label should say 3 lbs.

• If I send 2 books, it should be 6 lbs.

• If I send 3 books, it should be 9 lbs, and so on.
  
  

Instead, the system always says 3 lbs, which leads to constant mismatches.

In the short term, we just need the label weight to calculate correctly (books × 3 lbs).

Can you fix the weight calculation for return labels so they scale properly with the number of books?