GMAT Critical Reasoning (CR) | Re: The Observer is a newspaper company that has two divisions

The Observer is a newspaper company that has two divisions: The East Observer and The West Observer. All the employees at The Observer work in either of the two divisions. For the past five years, The East Observer has consistently accounted for 40% of the total workforce of The Observer while The West Observer has accounted for the rest. Over the same period, The West Observer has accounted for 50% of the total wages paid by The Observer.

Which of the following can properly be inferred about