To calculate the price of your job, take the cost of the type of Spray Foam you choose:
Open-cell Spray Foam cost is generally 0,35 to 0,55 cents per board foot
Closed-cell Spray Foam cost is generally $ 0.90 – $1.00 per board foot

For example,

2,500 sq ft, At 2″ thick of closed cell = $4,750. to $6,000
2,500 sq ft, At 4″ thick of open cell = $4,000. to $6,500

Minimum Service Charge Per Job is $2.100 To $2.500. Depending on Your Job and Situation.

The average total cost to have Spray Foam professionally installed is about $2,400.
Open-Cell Spray Foam	Closed-cell Spray Foam
$ 0,35 to $0,55 cents per board foot	$ 0.90 to $1.00 per board foot
Average Cost‎: ‎$2,400	High‎: ‎$3,500
Typical Range‎: ‎$1,500 and $3,500	Low‎: ‎$1,500