In contrast, the incidence proportion can be calculated as 16 â 2,100 = 7.6 cases per 1,000 population during the four-year period, or an average of 1.9 cases per 1,000 per year (7.6 divided by 4 years).
The Costs. Minimum Cost: Approximately $.50 per square foot. Maximum Cost: Approximately $2 per square foot. The size of roofs vary immensely from a standard, urban roof measuring about 800-square-feet to suburban roofs, which often range above 1,500-square-feet.aximum Cost: Approximately $2 per square foot. The size of roofs vary immensely from a standard, urban roof measuring about 800-square-feet to suburban roofs, which often range above 1,500-square-feet.
The Costs. The average maximum reported cost of red cedar shingle roofing in the United States is $8.87 per square foot. The average minimum reported cost of red cedar shingle roofing in the United States is $6.80 per square foot.When it comes to cedar roofing, red cedar is certainly the most popular option.he average maximum reported cost of red cedar shingle roofing in the United States is $8.87 per square foot. The average minimum reported cost of red cedar shingle roofing in the United States is $6.80 per square foot.