Some elements of the bill are called costs, while others are called payments, but the total is calculated by summing. To do a straight sum to find the total would all elements need to be either costs or payments?
Just noting here, some columns are called payments, but the values are given as negative (costs) so they can be summed with all the other columns to give the total cost.
Some elements of the bill are called costs, while others are called payments, but the total is calculated by summing. To do a straight sum to find the total would all elements need to be either costs or payments?