I used the formula it showed me in the video on the website. it worked for one of the answers but not the other two. i double checked my calculator too.

eBook Problem Walk-Through Investors require an 8% rate of return on Mather Company's stock (i.e., rs = 8%). a. What is its value if the previous dividend was Do = $1.50 and investors expect dividends to grow at a constant annual rate of (1) -2%, (2) 0%, (3) 3%, or (4) 6%? Do not round intermediate calculations. Round your answers to the nearest cent. (1) $ -15 (2) $ 18.75 (3) $ 120 (4) $ 525