Davy Metal Company produces brass fittings. Davy's engineers estimate the production function represented below as relevant for their long-run capital-labor decisions. Q=500L0.6K0.8 where Q= annual output measured in pounds, L= labor measured in person hours, K= capital measured in machine hours. Davy's employees are relatively highly skilled and earn $15 per hour. The firm estimates a rental charge of $50 per hour on capital. Given a $350,000 budget, how many machine hours should the firm employ