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.
Get an INSTANT estimate of the cost to Install a Tile Roof! Our free calculator uses recent, trusted data to estimate costs for your Tile Roofing Installation project. For a basic 120 square feet project in zip code 47474, the benchmark cost to Install a Tile Roof ranges between $9.49 - $15.25 per square foot* .To estimate costs for your project: 1. Set Project Zip Code Enter the Zip Code for the location where labor is hired and materials purchased.or a basic 120 square feet project in zip code 47474, the benchmark cost to Install a Tile Roof ranges between $9.49 - $15.25 per square foot* .