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Doll Furniture gives you the following information for the year ending December 2020.
Production	20,000 units
Sales	18,000 units
There is no opening stock of goods
Direct material per unit	OMR 2
Variable factory overheads	OMR 80,000
Fixed factory overheads	OMR 40,000
Variable selling overheads per unit	OMR 0.400
Fixed selling overheads	OMR 9,000
Selling price per unit	OMR 12

The total contribution margin under marginal costing method will be:

OMR 79,900

OMR 80,800

OMR 90,800

OMR 100,800