Answer:
they need to limit the material and labor costs to $22.75
so correct option is c. $22.75
Explanation:
given data
promotion and sales  =  $3 million
contribution margin = 35%
Selling price = Â $35.00
to find out
what would they need to limit the material and labor costs to
solution
we get first here Contribution margin per unit that is
Contribution margin = contribution margin × Selling price   ..............1
Contribution margin = $35  × 35%
Contribution margin = $12.25 per unit
and
Variable cost will be
Variable cost = Selling price - Contribution margin ..............2
Variable cost = $35 - $12.25
Variable cost = $22.75 per unit
and
Variable cost = Direct materials costs + Direct labor costs + Direct factory overheads   ...............3
here direct factory overheads is given = 0
so
$22.75 = Direct materials costs + Direct labor costs
so
they need to limit the material and labor costs to $22.75
so correct option is c. $22.75