In: Operations Management
Sara’s Ice Cream Shop is closed for six months out of the year
but has had the monthly sales amounts listed below for the last
four years.
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Asssuming that there is both seasonality and a trend, estimate monthly sales for each month of the coming year.
| 2021 | |
| MAY | |
| JUNE | |
| JULY | |
| AUGUST | |
| SEPTEMBER | |
| OCTOBER | |
Monthly Sales will be as follows:
| 2021 | May | 698587 |
| June | 804999 | |
| July | 1488059 | |
| August | 1698693 | |
| September | 921247 | |
| October | 504484 |
Fianl Outcome will be as follows: Follow Step by Step

STEP 1- Finding Intercept (Follow the excel formula)

STEP 2- Finding Slope (Follow the excel formula)

STEP- 3 Finding LT Forecast (Follow the excel formula) Drag till the last i.e. 2021 October

STEP-4 Finding Seasonality Index (Follow the excel formula)

STEP 5 Finding Seasonal Forecast with Trend (Follow the excel formula) Drag till the last i.e. 2021 October
