The quarterly sales data (number of copies sold) for a college textbook over the past two years
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Question:
The quarterly sales data (number of copies sold) for a college textbook over the past two years are given below and apply Winter's method for forecasting based on
| Year 1 | Quarter | Sales |
| 1 | 1 | 20 |
| 2 | 100 | |
| 3 | 175 | |
| 4 | 13 | |
| 2 | 1 | 47 |
| 2 | 186 | |
| 3 | 295 | |
| 4 | 76 |
- Determine and based on the given data.
- Determine the seasonal index of Quarter 1 of Year 1 (S1) .
- What is the level of January (L1) (Show your work using an equation)
- What is the predicted demand for quarter 1 year 1?
Determine the seasonal index of quarter 1 year 2 (Show your work
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