Mathematics · Absorption vs Marginal Costing

A company uses absorption costing to value inventory. Its fixed production overhead absorption rate is $12 per labour hour and each unit of production should take four labour hours. In a recent period when there was no opening inventory of finished goods, 20,000 units were produced using 100,000 labour hours. 18,000 units were sold and the actual profit was $464,000. What profit would have been reported under a marginal costing system?