Through heavy rain, a section of a mountainside measuring 3.6 km horizontally (perpendicular to the slope), 1.5 km up along the slope, and 0.44 m deep slips into a valley in a mud slide. Suppose that the mud ends up uniformly distributed over a surface area of the valley measuring 0.55 km x 0.55 km and that the mass of a cubic meter of mud is 1900 kg. What is the mass of the mud sitting above a 5.8 m2 area of the valley floor?