WIP work$-$in$-$progress inventory, a major investment for companies. WIP a portion of cost of goods sold $($COGS$)$ that has to be purchased, or produced in$-$house at the beginning of manufacturing of finished goods. General Electric manufactures jet engines for Boeing as part of their commercial jet production portfolio.

An industrial engineer at Boeing$$s Seattle location projected that they have $20$ weeks of WIP inventory $,$ including engines, wing components, etc. Annual revenue $($assume $50$ weeks$)$ at Boeing runs close to $$80$ billion, with COGS estimated at $80\%,$ with inventory holding cost at $44\%.$ What potential savings could be realized if they reduce WIP from $20$ weeks to $15$ weeks.