Lincoln, Inc., which uses a volume-based cost system, produces cat condos that sell for $170 each. Direct materials cost $21 per unit, and direct labor costs $17 per unit. Manufacturing overhead is applied at a rate of 200% of direct labor cost. Non-manufacturing costs are $28 per unit. What is the gross profit margin for the cat condos? 

i. 41.2%

ii. 58.8%

iii. 57.6%

iv. 41.3%