2-48 Sally Statistics is implementing a system of statis cal process control (SPC) charts in her factory in as effort to reduce the overall cost of scrapped product The current cost of scrap is $X per month. If an 80% learning curve is expected in the use of the SPC chan to reduce the cost of scrap, what would the perce age reduction in monthly scrap cost be after the chan have been used for 12 months? (Hint: Model each month as a unit of production.)