Actually I was easily able to find the "secret code" in the first task, but for whatever reason I was unable to type into the input and (I guess) I pressed enter accidentally, so it got submitted with no value :)

Please don't be surprised by the huge difference between my current gross salary and my expected gross salary. Currently I'm a freelancer here in Ukraine, so I'm just paying a 5% income tax, therefore my net salary almost equals to my gross salary. The amount of taxes to be payed will obviously be much higher if I become an employee