Come quickly to solve the math problem The functional relationship between the selling price P yuan and time t of a store in the past 30 days is p = {T + 20 (0

There seems to be some problems in the stem of the question. P and T are discontinuous functions. The function of P between 25 and 30 is - t + 70, which can be continuous. In this way, when t = 10, the maximum sales is 900. If according to the function in the question, the maximum t = 25, the sales is 1125