Material 0 cost showing, cost roll up

-Epicor 9.05.702a-
Hello all, we are having a issue with certain parts showing 0 material cost when trying to do a cost roll up. we do standard costing. it happened around the time we started making parts inactive. making the parts active again with a on hand qty doesn’t seem to fix it. deleting the rev and starting from scratch doesn’t fix it. i verified all the part and material in partmaster are correct setup and have a cost. (on hand, qty bearing, stocked, ect). Using different material parts in the BOM doesn’t fix it. new parts have no issue. Any help would be appreciated.