Cool Drinks Corp. is expanding in the markets of Russia, Ukraine, and Poland.

Required: Prepare a seasonal sales forecasting model using the historical sales data provided. Hint: use multiple regression analysis. Predict the next year's sales and compute standard errors of the forecasts.

Historical Sales Data:

Sales, thousands of liters	Year	Calendar Month
3000	1	1
3050	1	2
3100	1	3
3150	1	4
3200	1	5
3250	1	6
3300	1	7
3350	1	8
3400	1	9
3450	1	10
3500	1	11
3550	1	12
3600	2	13
3650	2	14
3700	2	15
3750	2	16
3800	2	17
3850	2	18
3900	2	19
3950	2	20
4000	2	21
4050	2	22
4100	2	23
4150	2	24
4200	2	25
4250	3	26
4300	3	27
4350	3	28
4400	3	29
4450	3	30
4500	3	31
4550	3	32
4600	3	33
4650	3	34
4700	3	35
4750	3	36