Little's Law $($Redesigning Production Process$).$ A firm has redesigned its

production process so that it now takes $10$ hours for a unit to be made. Using

the old process, it took $15$ hours to make a unit. If the process makes one unit

each hour on average and each unit is worth $$1,500,$ what is the reduction in

work$-$in$-$process value?

$$7,500$

$$1,800$

$$15,000$

$$1,500$