Problem 3-8 Predicting Sales

[karthi_math]

The following table shows a tool and die company's quarterly sales for the current year. What sales would you predict for the 1 quarter of next year?
Quarter relatives are q1 = 1.1, q2 = 0.99, q3 = 0.9 and q4 = 1 (Round the answer near to the whole number)

quarter 1 2 3 4
sales 99 102 104.4 129

Answer is 156 (T*S)

But i want to know in which way i can get this answer.

Inputs are welcome!

 

[Deleted member 4993]

What have you been taught about fore-casting/trend-line?

Please share with us your work, indicating exactly where you are stuck - so that we know where to begin to help you.