The number of service calls received at LaFortune Electric during four months is shown in the following

Question:

The number of service calls received at LaFortune Electric during four months is shown in the following table:
Month Number of Service Calls
April……………………………….19
May………………………………..31
June………………………………..27
July………………………………..29
Forecast the number of service calls in August by using a simple exponential smoothing model with a smoothing constant of 0.1. (Assume the forecast for April was 21.)