Answer:
See below
Explanation:
Direct materials :
$18
Direct labor :
1.9 hours × $18 labor costs
$34.2
Overhead
1.9 labor hours × ($1.50 fixed rate + $1.0 variable rate)
$4.75
Total unit cost
$18 + $34.2 + $4.75
$56.95
Cost to produce 640 chairs :
640 chairs × $56.95 per chair = $36,448