The following two years brought about a decrease to about $50 billion, followed by an increase in 1987 and a renewed decrease to about $50 billion in 1988.
Revenue increased from $93 billion to $120 billion, reflecting the significant impact of acquisitions made by a number of companies during the year, particularly the large integrated steel companies. However the increase in revenues of 29% was more than offset by an increase in operating costs of 45%.
In the course of the started topic, I would ask why in the first quote the indefinite article is used when it talks about particular figures and how the first "increase" differs from the other in the second quote, that is, why the first one takes "the" and the second takes "a".
Thank you.
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