I think blue and red are supposed to be "Profit" and "Loss", not revenues and costs, since I'm pretty sure all Olympics have both revenues and costs. Also, the Y-axis is already labeled deficit and surplus, so why not just use those instead of conflicting, misleading terms?
Surplus/deficit of Olympic Games and World Cups, 1964–2018 (all values in USD2018). Notes: See Figure 2.
Not sure why you would want to convert to local money, the OG are a global event, announcers and TV rights aren't going to pay less because the local cost of living is lower