Kappa Manufacturing Company has 120 machines in its factory. The machines run for three shifts each day. Each machine can be used for production for an average of 6 hours per shift. Assuming that during every shift 1.5 hours are allowed for machine maintenance and break time for machine operators, and that the factory operates for an average of six days per week, what is Kappa's :

Theoretical and practical capacity number of machine hours per week?