Roofers charge by the square (=100 square feet). Depending on your roof pitch (angle) and assuming it's a 400 square foot garage (20x20), the roof area will be about 550 square feet, or about 17 bundles of shingles.If you have any sheathing damage, you'll have to tear off the old roof, replace the damages sheathing and start from scratch.est Answer: A guy the another week got his whole roof done 1500sq ft it cost $3825, the highest quote he got was $4300.
Dealer Invoice Price - The invoice price of a new vehicle is the price on an invoice the manufacturer sends a dealer when they acquire a vehicle. many people believe that this is the true dealer cost of the vehicle, but in many cases - it is not, Invoice prices have hidden profit built into them such as dealer holdback and manufacturer to dealer incentives.
Note: You can also use our New Car Dealer Cost Calculator to simplify the calculation. The Dealer Costs Formula: Invoice Price-Holdback-Rebates & Incentives (If any)= Dealer Cost. Take the Invoice price and subtract the holdback. (Percentages Below). Take this amount and subtract any manufacturer rebates.epending on the make and model of the vehicle that you're researching, you should be able to use a number of different sites to find its current dealer invoice price. Visit Web sites like: 1  TrueCar.