W&B Performance Calculation
 

I am training for RPL (eventually to PPL and CPL) following Australian CASA syllabus. I am planning on sitting for my BAK exam soon and looking for some prep materials.

I can find lots of theory sample questions, but I was wondering if there is a place where I can find some hands-on W&B problems and performance calculations where I can actually use the calculator and POH charts.
Maximum weights, density and pressure altitude, centre of gravity, ballast weight, weight re-distribution, runway distances, etc.

I was quite diappointed to pay money for access to a few exam prep sites and they are mostly made up of multiple choice questions with very few calculation practices.

Any help, would be great. Thank you