Using MPN across multiple SKUs and inventory tracking

Using MPN across multiple SKUs and inventory tracking

I have several different SKU's that share a common MPN and would like to track inventory by MPN. 
  1. SKU1 has MPN1 assigned
  2. SKU2 has MPN1 assigned
 Here is an example
  1. If I start with 5 of MPN 1 in stock I want each SKU1 and SKU2 to show as 5 in stock,
  2. If I sell 2 of SKU1 the available inventory of SKU1 and SKU2 will slow as 3 available