We need the ability to setup inventory items/products as inners and outers.
Typically, we order an Inventory Item/Stock Item/Outer (eg Carton of Corona)
We then sell the Inner products (units) as part of the Outer
eg.
6pack = .25 x Carton
Stubby = 0.0416667 x Carton
Carton = 1 x Carton
