Bills Of Material PP

Q: We have a BOM - 'A' with two packing materials 'X' and 'Y'. For 1000 units of 'A', 1 packing material of 'X' is required and for 50 units of 'A', 1 packing material of 'Y' is required. Base quantity of 'A' is defined as 1000. How can I define 'X' & 'Y' or in fact 'A'?
A: Make the base quantity of 'A' as 5000. The resulting component quantities would be 5 of 'X' and 100 of 'Y'.