Given an EOQ model with shortages in which annual demand is $4200$ units, $Co=$$$160,Cc=$ $$7$ per unit per year, and $Cs=$$$25,$ what is the order quantity?

$456\mathrm{.}34$

$394\mathrm{.}72$

$296\mathrm{.}51$

$495\mathrm{.}74$