Rank Upgrades
Worker Rank -> Assembler Rank 9.99 5.00 USD Buy
Assember Rank -> Fabricator Rank 14.99 7.50 USD Buy
Fabricator Rank -> Expeditor Rank 14.99 7.50 USD Buy
Expeditor Rank -> Foreman Rank 24.99 12.50 USD Buy
Foreman Rank -> Mechanic Rank 24.99 12.50 USD Buy
Mechanic Rank -> Engineer Rank 49.99 25.00 USD Buy