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 August September October November December IBM $ 179.84 180.09 201.55 218.42 188.53 212.31 245.13 194.32 224.39 215.55 199.94 177.86 AMZN $ 625.01 631.76 562.79 550.90 493.66 485.98 608.79 533.31 510.62 609.81 584.60 664.60 IBM AMZN March April | May June July August September October November December