Unsure how to calculate naive forcast (part b) . thank you!

Sales of quit covers at Bud Banis's discount department store in Carbondale over the past year are shown below. Management prepare forecast using a combination of exponential smoothing and its collective judgment for the 4 months (March, April, May, and June) a) MAD for the forecast developed by the management's technique = sales (round your response to two decimal places). MAPE for the forecast developed by the management's technique =16.70% (round your response to two decimal places). b) Using the Naive Method, the forecast for period March through June is (round your response to two decimal places)