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 roofing grade can also affect the price, as higher grade shingles are thicker and more durable. As a result, they tend to cost closer to the $8.87 per square foot price rather than the $6.80 per square foot price.