The historical sale for a certain model of a single serve coffee maker in units is: January,

Question:

The historical sale for a certain model of a single serve coffee maker in units is: January, 18; February, 21; March, 16; April, 13; May, 17, and June, 20. Using a 2-month moving average, what is the forecast for July? If July experienced a demand of 100, what is the forecast for August?