How to prefix Batch number in FG product lot number generation

Hi,

How to prefix Batch number in the FG product lot number generation.

For instance, in the Batch number 15001, if FG product A is produced with 100 mt, then how to

1. Automate the lot number sequence with Batch number i.e. 15001-xxx1

2. Incase of incremental yield, how to add the product quantities to the same lot. i.e. single lot number to be maintained for the Batch

Thanks in Advance

Nair