How much does an upgrade of the Trader Virtual Garage cost?

Amount of Vehicles
 Upgrade Cost
Level 1
 5 Vehicles
 free
Level 2
 10 Vehicles 150.000 Poptabs
Level 3
 15 Vehicles
 225.000 Poptabs
Level 4
 20 Vehicles
 300.000 Poptabs
Level 5
 25 Vehicles
 375.000 Poptabs
Level 6
 30 Vehicles
 450.000 Poptabs
Level 7
 35 Vehicles
 525.000 Poptabs
Level 8
 40 Vehicles
 600.000 Poptabs
Level 9
 45 Vehicles
 675.000 Poptabs
Level 10
 50 Vehicles
 750.000 Poptabs