That sounds right. Here are the numbers which we paid:
http://www.imx6rex.com/2013/08/how-m...pcb-will-cost/Prototype price: $184.50 USD per PCB
Unit price: $140 | Quantity: 20pcs | Tooling $890
Total for 20 pieces of prototype PCB: $3690 USD / $184.50 per PCB
Mass production price: $9.32USD per PCB
Unit price: $8 | Quantity: 1000pcs | Tooling $1317
Total for 1000 pieces of prototype PCB: $9317 USD / $9.32 per PCB