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Whitehorse Company manufactures ultrasound equipment. Based on past experience, Whitehorse has found that total annual repair and maintenance cost can be represented by the following formula: total annual repair and maintenance cost = $300.000 + $10.00x, where x - machine hours. Last year. Whitehorse incurred 150,000 machine hours. Required: Calculate the following - show your calculations A. What was the total repair and maintenance cost incurred by Whitehorse last year? B. What was the total fixed repair and maintenance cost incurred by Whitehorse last year? C. What was the total variable repair and maintenance cost incurred by Whitehorse last year