19.(9 points) Company A has launched an efficient and environmentally friendly washing product. After listing at the beginning of the year, the company experienced a process from loss to profit. The following quadratic function image depicts the relationship between the accumulated profit S (ten thousand yuan) and the sales time T (month) since the beginning of the year (that is, the relationship between the total profit S and T in the first t months).

(1) Find the functional relationship between accumulated profit S (ten thousand yuan) and time T (month) from the three-point coordinates on the known image;

(2) At the end of several months, the accumulated profit of the company can reach 300,000 yuan;

(3) What is the company's profit in the eighth month?