The table below gives the relationship between the number of labor hours and the corresponding productivity per week in terms of the number of boxes of cookies that can be produced by Mother's Cookies Bakery production facility, based in Oakland, California.

Labor Hours 0 100 200 300 400 500 600 700

Productivity per Labor Hour 0 30 35 40 45 40 35 30

Is the production process described above short-run or long-run? Justify your answer. Use the data given to describe how the changes in the "productivity per labor hour" influence the cost structure of Mother's Cookies Bakery. Make any assumptions necessary to calculate the most efficient level of production per week.