how do they calculate these following columns I have these data:

I am sorry the data is in Portuguese, and it is an image so I can't convert it to a table but the translate "probably" ( i am not a native speakers for Portuguese language) is:


*

*The first column is the minute that the cars have entered to my garage.

*the second column is the distinct minutes 

*the third column is multiplying the distince minutes by the number of cars.


My question
how do they calculate the forth and fifth column

I would say:
forth column = third column / 170 * 100   (e.g.  2*20 / 170 * 100 = 23.53)
fifth column:
5.88   +      0  =   5.88
5.88   +   6.47  =  12.35
12.35   +  14.12  =  26.47
etc.
