Historically, demand has averaged $1453$ units per week with a standard deviation of $210$ The company currently has $844$ units in stock. What is the probability of a stockout? Z $=($x $-$ mu$)/$sigma $290\mathrm{.}0\%50\mathrm{.}000\%99\mathrm{.}813\%0\mathrm{.}187\%49\mathrm{.}813\%$