If you used round numbers as 1.6 rounded up is 2 as well as 2.4 rounded is 2 so if you do 2.4 + 2.4 this equals 4.8 which can be rounded to 5.which in rounded terms is 2+2=5 but originally it is...
Arrange a meeting, settle on a cost, then pay her when you're done. Simples. WARNING: Prostitute costs may vary, the economical downturn could see you paying well over £100 for these services.