$10-36.$ HIGH$-$LOW METHOD AND REGRESSION ANALYSIS.

Market Thyme, a cooperative of organic family$-$owned farms, has recently started a fresh produce club to provide support to the group's member farms and to promote the benefits of eating organic, locally produced food. Families pay a seasonal membership fee of $$100$ and place theirdorders a week in advance for a price of $$40$ per order. In turn, Market Thyme delivers fresh$-$picked seasonal local produce to several neighborhood distribution points. Five hundred families joined the club for the first season, but the number of orders varied from week to week.

Tom Diehl has run the produce club for the first season. Tom is now a farmer but remembers a few things about cost analysis from college. In planning for next year, he wants to know how many orders will be needed each week for the club to break even, but first he must estimate the club's fixed and variable costs. He has collected the following data over the club's first season of operation: