Sunny Drinks Co. is expanding its footprint in the markets of Brazil, Argentina, and Chile.

Required: Prepare a seasonal sales forecasting model using the historical sales data below. 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
4100	1	1
4150	1	2
4200	1	3
4250	1	4
4300	1	5
4350	1	6
4400	1	7
4450	1	8
4500	1	9
4550	1	10
4600	1	11
4650	1	12
4700	2	13
4750	2	14
4800	2	15
4850	2	16
4900	2	17
4950	2	18
5000	2	19
5050	2	20
5100	2	21
5150	2	22
5200	2	23
5250	2	24
5300	2	25
5350	3	26
5400	3	27
5450	3	28
5500	3	29
5550	3	30
5600	3	31
5650	3	32
5700	3	33
5750	3	34
5800	3	35
5850	3	36