Theres a game called TransOcean: The Shipping Company on Steam: https://store.steampowered.com/app/289930/TransOcean_The_Shi...

Theres a sequel to it, although I've never played it. First one wasn't too bad, the economics wasn't too complicated, but worthy of playing.

Sequel: https://store.steampowered.com/app/350110/TransOcean_2_Rival...