Formula works on Windows, but not in iOS or Mac

Hello group! I had a friend create a simple excel spreadsheet to help calculate airline monthly pay. She input the aircraft types and pay associated with years of service as the variables, and then I would, in theory, select which option applied to me and it would calculate my theoretical pay. The only issue is that it is not working on any Apple devices. If I upload the file here would anyone be willing to take a stab at it? What is frustrating is that it works for the default selection she saved it with (A320 with 5 years of service and 120 hours worked), but once you change a single variable it basically stops working.