Answer:
c. $587,100.
Step-by-step explanation:
The computation of the break even sales in dollars is shown below:
Break Even Sales = Fixed Cost ÷ Contribution Margin Ratio 
 where, 
Fixed cost is $405,099
And, the contribution margin ratio is 
= (sales price - variable cost) ÷ sales price 
 = ($215 - $66.65) ÷ $215 
 = 69%
Now placing these above formulae to the given formula 
= $405,099 ÷ 0.69 
 = $587,100 
 Hene, the correct option is c. $587,100