PCB design cost calculations

[Vindhyachal.takniki]

What is most used practice for PCB design cost calculation. I have designed a 310 mm x 170 mm board.

Below are specs:
Total number of pins: 899
Pins in a net: 899
Not connected pins: 0
Test pins: 0
Jumpers: 0
Total number of vias: 185
Total number of connections: 651
Unrouted connections: 0
Completion: 100%
Total number of parts: 285
Total number of nets: 253
PCB size: 310mm x 170mm
No of layers: 2

[matseng]

Eh?   Maybe the number of hours worked on the project times your desired hourly salary?