A real estate agent purchased 3 two-bedroom houses in a depressed market for a combined cost of $71000. He supposes the cleaning and repair cost on each house to average $3700 with a standard deviation of $1450. When he sells those subsequently subtracting taxes and other closing costs, he expects to gather an average of $39000 per house with a standard deviation of $1100. Find the predictable value of the net profit and the standard deviation of the net profit.