How To Calculate Seasonal Variation High Quality May 2026

Elena ran a small ice cream shop called "The Frosty Swirl" on the boardwalk of a beach town. Her summers were a glorious whirlwind of waffle cones and long lines. Her winters, however, were a ghost story of creaking floorboards and heating bills.

And every year, she recalculated the indices using the latest three years of data, because seasons shift. A new boardwalk hotel opened, boosting spring sales. Her Spring Index crept up from 0.99 to 1.10. how to calculate seasonal variation

| Year | Season | Sales (USD) | | :--- | :--- | :--- | | Year 1 | Summer | $60,000 | | Year 1 | Fall | $20,000 | | Year 1 | Winter | $10,000 | | Year 1 | Spring | $30,000 | | Year 2 | Summer | $70,000 | | Year 2 | Fall | $25,000 | | Year 2 | Winter | $12,000 | | Year 2 | Spring | $35,000 | Elena ran a small ice cream shop called