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

This is what I make of the columns:


*

*The second column is just a listing (in ascending order) of all distinct values in the first column. 

*The third tells you how often each distinct value occurs and how many cars this value contributes to the total. For example, by column 1 there are 2 minutes in which $12$ cars enter the garage/shop, i.e. the contribution of the value $12$ to the the total number of cars is $2 \cdot 12 = 24$.

*The fourth column shows relative contribution (i.e. percentage) of a certain value in the first column to the number of total cars. For the value $10$ it is $10/170 \approx 0.58824$, for 17 it is $5*17/170 = 0.5$ and so on.

*The fifth column is the cumulative percentage, i.e. adding up all the percentages up to a certain value. For the value $17$ you add the percentages of $10,11,12,17$.
