QS 21-18 (Algo) Margin of safety in dollars and as a percent of sales LO C2 Zhao Company has fixed costs of \\( \\$ 442,200 \\), its single prodpct sels for \\( \\$ 139 \\) por unit, and variabie costs are 5123 per unit if the company expects sales of 10,000 unins, compute its murgin of salety (a) in dollars and (b) as a percent of expected sales