Has anyone seen any recent (eg. 12.0, 13.0) successful forum answers for users who want to chart their BoM Cost over time? eg. a BoM Cost is $1,000 today, tomorrow it's $1,150 because someone changed the BoM membership, the child product(s) changed cost, someone added a service fee, or some other reason indirectly caused that rollup BOM Cost to change.