Game studios upgrade requirements

[HNLairport]

Does anyone have the game studio upgrade requirements for all the levels? Seems like all my neighbors have the same items to gift and they must be for the higher level studios. I’m still stuck on level 1 and 2, need coding handbooks, vending machines, and drawing boards.

I only have 2 sparrows and I fly the almost constantly but my drop rate is horrible.

 

[crescent moon (RIP)]

@Marve calculated and posted all the requirements. Posted in the 7.5 update thread. https://www.airportcitygame.com/threads/7-5-update.28451/page-12#post-439206