My business is auto glass.  Now, there are several "attributes" Google is asking for that I can't give a good answer for. 

Auto glass is of course a subset of auto parts.  Now auto repair costs vary based on a few factors:
- Year, make, and model of the vehicle.
- Type of the glass, i.e. windshield, door glass, vent glass, quarter glass, back glass, or slider
- Brand of the glass
- How competitive we have to be to get the job.

So, there are some "attributes" I really can't use, such as:
- Price.  How can I give a price when the cost of a windshield varies so much, from $31 to $232--just in the last few days!  Of course, those are two very different cars.
- Brand.  How can I give a brand for a glass when I am unsure which will be the least expensive?  There are more than 100 brands of auto glass.
- Availability:  Again, this depends on the year, make, and model of the vehicle, as well as the type of glass.

Please help.