A fountain stands on a scale and has reached steady state. Water is pumped up through a vertical nozzle of cross-sectional area $A$ and leaves the nozzle with constant upward speed $v_0$. The water rises, falls back, and lands in the surrounding pool, where the pump recirculates it. The mass of water currently held inside the pump, pipe, and pool is $M_w$; the dry mass of the fountain hardware is $M_f$. Air resistance is negligible, the pool is wide enough to catch all returning water, and the density of water is $\rho$. Take $g$ as the gravitational acceleration. What does the scale read?