Given the following data:

$\backslash$table$[[$Item$,\backslash$table$[[$Usage per$],[$Parent$]],\backslash$table$[[$Lead Time$],[($weeks$)]]],[$J$,-,1],[$K$,4,3],[$L$,2,2],[$M$,4,3],[$N$,1,1],[$O$,2,2]]$

The end product $J$ is made from components $K,$ and $L.K$ is made from $M,N,$ and $O.$