Cut = (L/25.4)+(W/25.4)+2 | Roll = (W/25.4)+(D/25.4), next even
Net Rate = (Cut × Roll × GSM × 2 × Rate) / 1550 / 1000
With Margin = Net Rate × (1 + Margin/100)
Net Rate = ((L/25.4) × (W/25.4) × GSM × Paper Rate) / 1550 / 1000
With Margin = Net Rate × (1 + Margin/100)