Cells are cultured and concentrated to 100 g/L of biomass, without any other components. A stream of 10 L/h of the cells is then mixed with a stream containing 50 g/L of substrate at 150 L/h. The mixed stream is then fed into a 50 L stirred tank bioreactor and reacts anaerobically to form an extracellular product. Assume no cell growth and no cell death in the reactor. The product formation has the following parameters. qp = 0.2 gP/gX h1, YP/S = 0.3 g/g. Determine the product concentration leaving the reactor in g/L.