A company normally sells its product for $20 per unit. However, the selling price has fallen to $15 per unit. This company's current inventory consists of 200 units purchased at $16 per unit. Replacement cost has now fallen to $13 per unit.
Install Roof Shingles Cost. Typical cost to have roofing shingles installed in San Antonio, TX is around $80 - $100 (per square, asphalt). Roof Replacement Cost. Typical cost to have roofing replaced in San Antonio, TX is around $5,760 (24'x45').
How much a new roof should cost. Average costs and comments from CostHelper's team of professional journalists and community of users. Do-it-yourself materials to install an asphalt shingle roof on an average one-story ranch-style home (with a gently sloping roof of 1,700-2,100 square feet) can run $680-$3,700, depending on the quality of the materials.