Aggregating

Aggregating means summarising information by sub-totalling or totalling. A shop receipt aggregates information by totalling the cost of each item. The information that is aggregated is the information we tend to be most interested in. In the case of a bill, we are generally most interested in the aggregate total.

For each of the bills below, the aggregate or total has been missed out. Calculate the aggregate for each of these bills:

1.



2.



3.