Small Bunker Silo v1.2.0.0

Each bunker has a capacity of round about 300.000 litres of chaff.

Changelog 1.2.0.0:
-Added:
Single Bunker Silo U Type
Price: 12500$
Daily upkeep: 20$/day

Single Bunker Silo
Price: 22000$
Daily upkeep: 25$/day

Changelog 1.1.0.0:
-Added:
2x Single Bunker Silo
Price: 22500/23000$
Daily upkeep: 25$/day