How does the inventory module handle assemblies? For example I sell a kit, made up of inventory items a, b, c. I purchase 100 of a,b,c and receive them into the warehouse. I then take 20 of each a,b,c and make 20 kits. I should then have 80 of a,b,c and 20 kits in inventory. I then sell 10 kits. So I should have 10 kits in inventory and 80 of a,b,c. Does that make sense?