A company that manufactures a single product supplied the following budgeted details: Budgeted production and factory overheads costs were 3 000 units and N$15 000, respectively. selling price per unit is N$150, variable cost per unit: Direct material N$30, Direct labour N$ 40, Variable overheads N$20, fixed overheads per month N$60 000. During the past month 3000 units were manufactured while only 600 units were on hand. The profit for the month according to the direct/marginal costing method was: