For the scenario given in Part A$,$ we will change our assumptions as follows.

$-$ We expect $1$ out of $40$ dies to have a defect.

$-$ We do not want to ship out dies with a defect. Taking out a die with a defect costs $$1.$

$-$ Our production line does not waste any wafer area when producing dies.

$-$ A wafer costs $$1900$ to produce.

How many dies should be produced to keep the cost of a die under $$5?$