Sorting In Spreadsheet Where Lines Are Sequenced By Finished Good And Component Parts

I have a very large inventory spreadsheet (30,000+ lines) where finished goods are listed on one line and the raw materials (parts) that make up that finished good are listed below. After the last raw material for a finished good is listed, the next finished good is on the next line (and so on). First, I need to sort the lines to eliminate certain common raw materials. Next I need to take the lowest raw material inventory level and have that as the default inventory level for the finished good.