Swag, Incorporated uses the high-low method to analyze cost behavior. The company observed that at 19,000 machine hours of activity, total maintenance costs averaged $37.50 per hour. When activity jumped to 25,000 machine hours, which was still within the relevant range, the average total cost per machine hour was $30.30. On the basis of this information, the fixed cost for Swag was: (a) $142,500, (b) $570,000, (c) $712,500, (d) $230,000, (e) $757,500.