how to calculate Perforated metal mesh square meters Price?

Know the network the following hole Perforated Metal network specifications, it could have easily calculate the weight:
1 wire diameter (unit must be MM)
2 mesh (1 inch mesh within the number)
3. Volume / Duration (in must be M)
4 roll / sheet width (unit must be M)
Mesh accounting: square net weight = net thickness * Width * 1M * 7.85 * (1-N)
Perforated Metal mesh square meters Price = square hole number * board price / sqm + processing fee + N = Perforated Metal rate of flow of charge