The following sales and cost data are provided: Direct materials used R150 000 Direct labour R200 000 Overheads (all indirect, 60% variable) R100 000 Selling and administration expenses (50% direct and 75% variable) R300 000 Required: Calculate the following costs: 1. Prime costs (2) 2. Conversion costs (2) 3. Product cost (3) 4. Period costs (1) 5. Variable production cost (2) 6. Total fixed costs (2)