The table below shows the closing monthly stock prices for IBM and Amazon. Calculate the simple three-month moving average for each month for both companies. (Input all amounts as positive values. Do not round intermediate calculations. Round your answers to 2 decimal places.) January February March April May June July IBM $ 181.64 181.29 205.33 222.41 187.09 213.69 249.12 190.63 225.83 215.91 201.29 178.70 AMZN $ 629.36 635.00 558.56 552.10 487.42 482.38 609.69 531.96 509.84 612.84 581.99 667.90 August September October November December IBM AMZN March | April May June July August September October November December