The R.U.O.K. Company sells drones. Monthly sales for the last 6 months are as follows:

Month              Units

January           1,500

February         1,750

March             2,050

April               2,200

May                1,800

June                1,950

Compute the sales forecast for July using the following approaches:

a. a four month moving average

b. a weighted 4 month moving average using 0.5 for the previous month, 0.25 for 2 months prior, 0.15 for 3 months prior and 0.1 for 4 months prior.

c. The linear trend regression equation for this data set is Y=72.9x+1620. Use the linear regression equation and provide the forecast for July.