Dear Rohan Dev,
I guess there isn't enough data to create a forecast....i am new too to SCM....
You would have to start with a Niave forecast for Feburary of 100 ( based on January's actual sales)
With an actual sales of 150 for Feburay which was forecasted at 100 gives an error of 50
You then forecast the 2MA for March at 100+150/2 for 125.
Actual sales for March is 90 which gives an error of 35. (125-90)
You can now move to an exponential smoothing method with alpha at .3
Ft = Ft-1 + .3(dt-1 - Ft-1)
Which now give you a forecast for April at 100.5
or if you stick with the 2MA your forcast for April would be 150 + 90 = 120