Agas station with two pumps estimates that the cost of a customer waiting (includes the time in queue and the time spent in filling the gas) is worth 20 dollars per hour. they have calculated that the current operational cost of the pump is also $20 per hour. assuming that the pump has ten arrivals per hour, and that it takes 4 minutes to fuel up, what is the hourly total variable cost at the pump (total cost of customer waiting plus the cost of the pump – answer in dollars per hour and two decimals)?

1. alwaysrain irrigation, inc. would like to determine capacity requirements for the next four years. currently, two production lines are in place for making bronze and plastic sprinklers. three types of sprinklers are available in both bronze and plastic: 90-degree nozzle sprinklers, 180-degree nozzle sprinklers, and 360-degree nozzle sprinklers. management has forecast demand for the next four years as follows: both production lines can produce all the different types of nozzles. the bronze machines needed for the bronze sprinklers require two operators and can produce up to 12,000 sprinklers. the plastic injection molding machine needed for the plastic sprinklers requires four operators and can produce up to 200,000 sprinklers. three bronze machines and only one injection molding machine are available. what are the capacity requirements for the next four years? (assume that there is no learning.)