Townside Food Vending operates vending machines in office buildings, the airport, bus stations, colleges, and other businesses and agencies around town and operates vending trucks for building and construction sites. The company believes its sandwich sales follow a seasonal pattern. It has accumulated the following data for sandwich sales per season during the past four years.

Develop a seasonally adjusted forecast model for these sandwich sales data. Forecast demand for each season for 2011 using a linear trend line estimate for sales in 2011. Do the data appear to have a seasonalpattern?

Transcribed Image Text:

Sandwich Sales (1000s) Seas on Fall Winter Spring Summer 2007 42.7 36.9 51.3 62.9 200820092010 45.7 34.8 49.3 71.2 44.3 42.7 55.6 64.8 40.6 41.5 473 74.5