We need more specifics on what you are pricing..Such as:
New contruction-residential
New construction-commercial
Commercial maintenance
Residential Maintenance
Storefront glass
Regular glass
Inside & out
One side only
Ground floor
2 stories or higher
Scraping required
Service how often
etc, etc, etc...
As you can see there are many variables with glass, and this is just in pricing.. the actual cleaning of the glass has some variations as well and are a different subject altogether....