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').
Average Cost. The average cost for a patio roof addition using low-maintenance wood-patterned aluminum runs for about $6,000 to $10,000 for an area of 20 by 20 feet, as of 2011. A screen can be added for an additional cost of $3,000 to $4,000.