Porterhouse Company incurs both fixed and variable production costs. Assuming the production is within the relevant range, if volume goes up by 20%, then the total costs would: A) increase by 20%. B) remain the same. C) increase by an amount less than 20%. D) decrease by 20%. From the graph given below, identify the fixed costs line. A) OB B) AC C) AD D)AE From the graph given below, identify the sales revenue line. A) OB B) AC C) AD D) AE Pluto Company sold 2,000 units in October at a price of $35 per unit. The variable cost is $20 per unit. The monthly fixed costs are $10,000. What is the operating income earned in October? A) $30,000 B) $70,000 C) $20,000 D) $40,000